[gimp] Get rid of capitalized "ID" in function and variable names



commit 7201d482314dfadd03430df5770569ae0d151568
Author: Michael Natterer <mitch gimp org>
Date:   Fri Aug 23 22:23:23 2019 +0200

    Get rid of capitalized "ID" in function and variable names
    
    and use "id" instead.

 app/actions/windows-actions.c        |  2 +-
 app/core/gimp-gui.c                  | 12 ++++----
 app/core/gimp-gui.h                  |  8 ++---
 app/core/gimp.c                      |  6 ++--
 app/core/gimp.h                      |  6 ++--
 app/core/gimpauxitem.c               | 10 +++----
 app/core/gimpauxitem.h               |  2 +-
 app/core/gimpimage-colormap.c        |  6 ++--
 app/core/gimpimage-guides.c          |  8 ++---
 app/core/gimpimage-sample-points.c   |  6 ++--
 app/core/gimpimage.c                 |  6 ++--
 app/core/gimpimage.h                 |  4 +--
 app/core/gimpitem.c                  | 10 +++----
 app/core/gimpitem.h                  |  4 +--
 app/core/gimpparamspecs.c            | 45 +++++++++++++++-------------
 app/core/gimpsymmetry-mandala.c      |  2 +-
 app/core/gimpsymmetry-mirror.c       |  2 +-
 app/dialogs/palette-import-dialog.c  |  2 +-
 app/display/gimpdisplay.c            | 18 +++++------
 app/display/gimpdisplay.h            |  6 ++--
 app/display/gimpdisplayshell-title.c |  4 +--
 app/errors.c                         |  4 +--
 app/file/file-save.c                 | 12 ++++----
 app/gui/gui-vtable.c                 | 26 ++++++++--------
 app/menus/windows-menu.c             |  4 +--
 app/pdb/fileops-cmds.c               |  2 +-
 app/pdb/gimppdb-utils.c              | 58 ++++++++++++++++++------------------
 app/pdb/gimppdb-utils.h              |  6 ++--
 app/pdb/image-cmds.c                 |  8 ++---
 app/pdb/image-guides-cmds.c          |  8 ++---
 app/pdb/image-sample-points-cmds.c   |  6 ++--
 app/pdb/item-cmds.c                  |  2 +-
 app/pdb/vectors-cmds.c               | 12 ++++----
 app/plug-in/gimpplugin-cleanup.c     | 16 +++++-----
 app/plug-in/gimpplugin-message.c     | 26 ++++++++--------
 app/plug-in/gimppluginmanager-call.c | 12 ++++----
 app/plug-in/gimppluginshm.c          | 36 +++++++++++-----------
 app/plug-in/gimppluginshm.h          |  2 +-
 app/tools/gimpfiltertool.c           |  2 +-
 app/vectors/gimpstroke.c             | 12 ++++----
 app/vectors/gimpstroke.h             |  6 ++--
 app/vectors/gimpvectors.c            | 20 ++++++-------
 app/vectors/gimpvectors.h            |  4 +--
 app/widgets/gimpselectiondata.c      | 12 ++++----
 app/widgets/gimpviewabledialog.c     |  2 +-
 libgimp/gimp.c                       |  8 ++---
 libgimp/gimptilebackendplugin.c      | 10 +++----
 libgimpbase/gimpprotocol.c           | 16 +++++-----
 libgimpbase/gimpprotocol.h           |  8 ++---
 pdb/groups/fileops.pdb               |  2 +-
 pdb/groups/image.pdb                 |  8 ++---
 pdb/groups/image_guides.pdb          |  8 ++---
 pdb/groups/image_sample_points.pdb   |  6 ++--
 pdb/groups/item.pdb                  |  2 +-
 pdb/groups/vectors.pdb               | 12 ++++----
 55 files changed, 276 insertions(+), 271 deletions(-)
---
diff --git a/app/actions/windows-actions.c b/app/actions/windows-actions.c
index bd6a680054..8beb5b837e 100644
--- a/app/actions/windows-actions.c
+++ b/app/actions/windows-actions.c
@@ -393,7 +393,7 @@ windows_actions_image_notify (GimpDisplay      *display,
       escaped = gimp_escape_uline (display_name);
 
       title = g_strdup_printf ("%s-%d.%d", escaped,
-                               gimp_image_get_ID (image),
+                               gimp_image_get_id (image),
                                gimp_display_get_instance (display));
       g_free (escaped);
 
diff --git a/app/core/gimp-gui.c b/app/core/gimp-gui.c
index 57940e31c3..b854fd68d3 100644
--- a/app/core/gimp-gui.c
+++ b/app/core/gimp-gui.c
@@ -239,7 +239,7 @@ gimp_get_program_class (Gimp *gimp)
 
 gchar *
 gimp_get_display_name (Gimp     *gimp,
-                       gint      display_ID,
+                       gint      display_id,
                        GObject **monitor,
                        gint     *monitor_number)
 {
@@ -248,7 +248,7 @@ gimp_get_display_name (Gimp     *gimp,
   g_return_val_if_fail (monitor_number != NULL, NULL);
 
   if (gimp->gui.get_display_name)
-    return gimp->gui.get_display_name (gimp, display_ID,
+    return gimp->gui.get_display_name (gimp, display_id,
                                        monitor, monitor_number);
 
   *monitor = NULL;
@@ -322,19 +322,19 @@ gimp_get_empty_display (Gimp *gimp)
 }
 
 GimpObject *
-gimp_get_display_by_ID (Gimp *gimp,
-                        gint  ID)
+gimp_get_display_by_id (Gimp *gimp,
+                        gint  id)
 {
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
   if (gimp->gui.display_get_by_id)
-    return gimp->gui.display_get_by_id (gimp, ID);
+    return gimp->gui.display_get_by_id (gimp, id);
 
   return NULL;
 }
 
 gint
-gimp_get_display_ID (Gimp       *gimp,
+gimp_get_display_id (Gimp       *gimp,
                      GimpObject *display)
 {
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), -1);
diff --git a/app/core/gimp-gui.h b/app/core/gimp-gui.h
index dc4552fe98..f4db2c894c 100644
--- a/app/core/gimp-gui.h
+++ b/app/core/gimp-gui.h
@@ -44,7 +44,7 @@ struct _GimpGui
 
   const gchar  * (* get_program_class)      (Gimp                *gimp);
   gchar        * (* get_display_name)       (Gimp                *gimp,
-                                             gint                 display_ID,
+                                             gint                 display_id,
                                              GObject            **monitor,
                                              gint                *monitor_number);
   guint32        (* get_user_time)          (Gimp                *gimp);
@@ -115,9 +115,9 @@ void           gimp_gui_ungrab             (Gimp                *gimp);
 
 GimpObject   * gimp_get_window_strategy    (Gimp                *gimp);
 GimpObject   * gimp_get_empty_display      (Gimp                *gimp);
-GimpObject   * gimp_get_display_by_ID      (Gimp                *gimp,
+GimpObject   * gimp_get_display_by_id      (Gimp                *gimp,
                                             gint                 ID);
-gint           gimp_get_display_ID         (Gimp                *gimp,
+gint           gimp_get_display_id         (Gimp                *gimp,
                                             GimpObject          *display);
 guint32        gimp_get_display_window_id  (Gimp                *gimp,
                                             GimpObject          *display);
@@ -158,7 +158,7 @@ void           gimp_free_progress          (Gimp                *gimp,
 
 const gchar  * gimp_get_program_class      (Gimp                *gimp);
 gchar        * gimp_get_display_name       (Gimp                *gimp,
-                                            gint                 display_ID,
+                                            gint                 display_id,
                                             GObject            **monitor,
                                             gint                *monitor_number);
 guint32        gimp_get_user_time          (Gimp                *gimp);
diff --git a/app/core/gimp.c b/app/core/gimp.c
index 41f074ce08..8ccdeccbdc 100644
--- a/app/core/gimp.c
+++ b/app/core/gimp.c
@@ -243,8 +243,8 @@ gimp_init (Gimp *gimp)
   gimp->images = gimp_list_new_weak (GIMP_TYPE_IMAGE, FALSE);
   gimp_object_set_static_name (GIMP_OBJECT (gimp->images), "images");
 
-  gimp->next_guide_ID        = 1;
-  gimp->next_sample_point_ID = 1;
+  gimp->next_guide_id        = 1;
+  gimp->next_sample_point_id = 1;
   gimp->image_table          = gimp_id_table_new ();
   gimp->item_table           = gimp_id_table_new ();
 
@@ -254,7 +254,7 @@ gimp_init (Gimp *gimp)
                                  "append",        TRUE,
                                  NULL);
   gimp_object_set_static_name (GIMP_OBJECT (gimp->displays), "displays");
-  gimp->next_display_ID = 1;
+  gimp->next_display_id = 1;
 
   gimp->named_buffers = gimp_list_new (GIMP_TYPE_BUFFER, TRUE);
   gimp_object_set_static_name (GIMP_OBJECT (gimp->named_buffers),
diff --git a/app/core/gimp.h b/app/core/gimp.h
index fced558442..8008f55671 100644
--- a/app/core/gimp.h
+++ b/app/core/gimp.h
@@ -81,13 +81,13 @@ struct _Gimp
   GList                  *filter_history;
 
   GimpContainer          *images;
-  guint32                 next_guide_ID;
-  guint32                 next_sample_point_ID;
+  guint32                 next_guide_id;
+  guint32                 next_sample_point_id;
   GimpIdTable            *image_table;
   GimpIdTable            *item_table;
 
   GimpContainer          *displays;
-  gint                    next_display_ID;
+  gint                    next_display_id;
 
   GList                  *image_windows;
 
diff --git a/app/core/gimpauxitem.c b/app/core/gimpauxitem.c
index f35f8cf13b..5844a706a9 100644
--- a/app/core/gimpauxitem.c
+++ b/app/core/gimpauxitem.c
@@ -41,7 +41,7 @@ enum
 
 struct _GimpAuxItemPrivate
 {
-  guint32  aux_item_ID;
+  guint32  aux_item_id;
 };
 
 
@@ -103,7 +103,7 @@ gimp_aux_item_get_property (GObject    *object,
   switch (property_id)
     {
     case PROP_ID:
-      g_value_set_uint (value, aux_item->priv->aux_item_ID);
+      g_value_set_uint (value, aux_item->priv->aux_item_id);
       break;
 
     default:
@@ -123,7 +123,7 @@ gimp_aux_item_set_property (GObject      *object,
   switch (property_id)
     {
     case PROP_ID:
-      aux_item->priv->aux_item_ID = g_value_get_uint (value);
+      aux_item->priv->aux_item_id = g_value_get_uint (value);
       break;
 
     default:
@@ -133,11 +133,11 @@ gimp_aux_item_set_property (GObject      *object,
 }
 
 guint32
-gimp_aux_item_get_ID (GimpAuxItem *aux_item)
+gimp_aux_item_get_id (GimpAuxItem *aux_item)
 {
   g_return_val_if_fail (GIMP_IS_AUX_ITEM (aux_item), 0);
 
-  return aux_item->priv->aux_item_ID;
+  return aux_item->priv->aux_item_id;
 }
 
 void
diff --git a/app/core/gimpauxitem.h b/app/core/gimpauxitem.h
index 6907b39295..028542d823 100644
--- a/app/core/gimpauxitem.h
+++ b/app/core/gimpauxitem.h
@@ -48,7 +48,7 @@ struct _GimpAuxItemClass
 
 GType     gimp_aux_item_get_type (void) G_GNUC_CONST;
 
-guint32   gimp_aux_item_get_ID       (GimpAuxItem *aux_item);
+guint32   gimp_aux_item_get_id       (GimpAuxItem *aux_item);
 
 void      gimp_aux_item_removed      (GimpAuxItem *aux_item);
 
diff --git a/app/core/gimpimage-colormap.c b/app/core/gimpimage-colormap.c
index 2762935674..2647e37aea 100644
--- a/app/core/gimpimage-colormap.c
+++ b/app/core/gimpimage-colormap.c
@@ -66,10 +66,10 @@ gimp_image_colormap_init (GimpImage *image)
   g_return_if_fail (private->palette == NULL);
 
   palette_name = g_strdup_printf (_("Colormap of Image #%d (%s)"),
-                                  gimp_image_get_ID (image),
+                                  gimp_image_get_id (image),
                                   gimp_image_get_display_name (image));
   palette_id = g_strdup_printf ("gimp-indexed-image-palette-%d",
-                                gimp_image_get_ID (image));
+                                gimp_image_get_id (image));
 
   private->n_colors = 0;
   private->colormap = g_new0 (guchar, GIMP_IMAGE_COLORMAP_SIZE);
@@ -142,7 +142,7 @@ gimp_image_colormap_update_formats (GimpImage *image)
   space = gimp_image_get_layer_space (image);
 
   format_name = g_strdup_printf ("-gimp-indexed-format-%d",
-                                 gimp_image_get_ID (image));
+                                 gimp_image_get_id (image));
 
   babl_new_palette_with_space (format_name, space,
                                &private->babl_palette_rgb,
diff --git a/app/core/gimpimage-guides.c b/app/core/gimpimage-guides.c
index a265d1e825..54f85cb120 100644
--- a/app/core/gimpimage-guides.c
+++ b/app/core/gimpimage-guides.c
@@ -46,7 +46,7 @@ gimp_image_add_hguide (GimpImage *image,
                         position <= gimp_image_get_height (image), NULL);
 
   guide = gimp_guide_new (GIMP_ORIENTATION_HORIZONTAL,
-                          image->gimp->next_guide_ID++);
+                          image->gimp->next_guide_id++);
 
   if (push_undo)
     gimp_image_undo_push_guide (image,
@@ -70,7 +70,7 @@ gimp_image_add_vguide (GimpImage *image,
                         position <= gimp_image_get_width (image), NULL);
 
   guide = gimp_guide_new (GIMP_ORIENTATION_VERTICAL,
-                          image->gimp->next_guide_ID++);
+                          image->gimp->next_guide_id++);
 
   if (push_undo)
     gimp_image_undo_push_guide (image,
@@ -177,7 +177,7 @@ gimp_image_get_guide (GimpImage *image,
     {
       GimpGuide *guide = guides->data;
 
-      if (gimp_aux_item_get_ID (GIMP_AUX_ITEM (guide)) == id)
+      if (gimp_aux_item_get_id (GIMP_AUX_ITEM (guide)) == id)
         return guide;
     }
 
@@ -208,7 +208,7 @@ gimp_image_get_next_guide (GimpImage *image,
       if (*guide_found) /* this is the first guide after the found one */
         return guide;
 
-      if (gimp_aux_item_get_ID (GIMP_AUX_ITEM (guide)) == id) /* found it, next one will be returned */
+      if (gimp_aux_item_get_id (GIMP_AUX_ITEM (guide)) == id) /* found it, next one will be returned */
         *guide_found = TRUE;
     }
 
diff --git a/app/core/gimpimage-sample-points.c b/app/core/gimpimage-sample-points.c
index 24fc66f2b2..1b51fb5451 100644
--- a/app/core/gimpimage-sample-points.c
+++ b/app/core/gimpimage-sample-points.c
@@ -46,7 +46,7 @@ gimp_image_add_sample_point_at_pos (GimpImage *image,
   g_return_val_if_fail (x >= 0 && x < gimp_image_get_width  (image), NULL);
   g_return_val_if_fail (y >= 0 && y < gimp_image_get_height (image), NULL);
 
-  sample_point = gimp_sample_point_new (image->gimp->next_sample_point_ID++);
+  sample_point = gimp_sample_point_new (image->gimp->next_sample_point_id++);
 
   if (push_undo)
     gimp_image_undo_push_sample_point (image, C_("undo-type", "Add Sample Point"),
@@ -174,7 +174,7 @@ gimp_image_get_sample_point (GimpImage *image,
     {
       GimpSamplePoint *sample_point = sample_points->data;
 
-      if (gimp_aux_item_get_ID (GIMP_AUX_ITEM (sample_point)) == id)
+      if (gimp_aux_item_get_id (GIMP_AUX_ITEM (sample_point)) == id)
         return sample_point;
     }
 
@@ -205,7 +205,7 @@ gimp_image_get_next_sample_point (GimpImage *image,
       if (*sample_point_found) /* this is the first guide after the found one */
         return sample_point;
 
-      if (gimp_aux_item_get_ID (GIMP_AUX_ITEM (sample_point)) == id) /* found it, next one will be returned 
*/
+      if (gimp_aux_item_get_id (GIMP_AUX_ITEM (sample_point)) == id) /* found it, next one will be returned 
*/
         *sample_point_found = TRUE;
     }
 
diff --git a/app/core/gimpimage.c b/app/core/gimpimage.c
index 379d327ce3..a0e63644de 100644
--- a/app/core/gimpimage.c
+++ b/app/core/gimpimage.c
@@ -1237,7 +1237,7 @@ gimp_image_get_description (GimpViewable  *viewable,
 
   return g_strdup_printf ("%s-%d",
                           gimp_image_get_display_name (image),
-                          gimp_image_get_ID (image));
+                          gimp_image_get_id (image));
 }
 
 static void
@@ -1894,7 +1894,7 @@ gimp_image_unset_default_new_layer_mode (GimpImage *image)
 }
 
 gint
-gimp_image_get_ID (GimpImage *image)
+gimp_image_get_id (GimpImage *image)
 {
   g_return_val_if_fail (GIMP_IS_IMAGE (image), -1);
 
@@ -1902,7 +1902,7 @@ gimp_image_get_ID (GimpImage *image)
 }
 
 GimpImage *
-gimp_image_get_by_ID (Gimp *gimp,
+gimp_image_get_by_id (Gimp *gimp,
                       gint  image_id)
 {
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
diff --git a/app/core/gimpimage.h b/app/core/gimpimage.h
index a5a6e94d02..205efc9a4c 100644
--- a/app/core/gimpimage.h
+++ b/app/core/gimpimage.h
@@ -140,8 +140,8 @@ GimpLayerMode   gimp_image_get_default_new_layer_mode
 void            gimp_image_unset_default_new_layer_mode
                                                  (GimpImage          *image);
 
-gint            gimp_image_get_ID                (GimpImage          *image);
-GimpImage     * gimp_image_get_by_ID             (Gimp               *gimp,
+gint            gimp_image_get_id                (GimpImage          *image);
+GimpImage     * gimp_image_get_by_id             (Gimp               *gimp,
                                                   gint                id);
 
 GFile         * gimp_image_get_file              (GimpImage          *image);
diff --git a/app/core/gimpitem.c b/app/core/gimpitem.c
index 36d02641b6..aeda85b023 100644
--- a/app/core/gimpitem.c
+++ b/app/core/gimpitem.c
@@ -1890,7 +1890,7 @@ gimp_item_remove_offset_node (GimpItem *item,
 }
 
 gint
-gimp_item_get_ID (GimpItem *item)
+gimp_item_get_id (GimpItem *item)
 {
   g_return_val_if_fail (GIMP_IS_ITEM (item), -1);
 
@@ -1898,7 +1898,7 @@ gimp_item_get_ID (GimpItem *item)
 }
 
 GimpItem *
-gimp_item_get_by_ID (Gimp *gimp,
+gimp_item_get_by_id (Gimp *gimp,
                      gint  item_id)
 {
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
@@ -2009,11 +2009,11 @@ gimp_item_replace_item (GimpItem *item,
 
   if (private->ID)
     gimp_id_table_remove (gimp_item_get_image (item)->gimp->item_table,
-                          gimp_item_get_ID (item));
+                          gimp_item_get_id (item));
 
-  private->ID = gimp_item_get_ID (replace);
+  private->ID = gimp_item_get_id (replace);
   gimp_id_table_replace (gimp_item_get_image (item)->gimp->item_table,
-                         gimp_item_get_ID (item),
+                         gimp_item_get_id (item),
                          item);
 
   /* Set image before tattoo so that the explicitly set tattoo overrides
diff --git a/app/core/gimpitem.h b/app/core/gimpitem.h
index 6bc56e3dcb..45c82c2763 100644
--- a/app/core/gimpitem.h
+++ b/app/core/gimpitem.h
@@ -320,8 +320,8 @@ void            gimp_item_add_offset_node    (GimpItem           *item,
 void            gimp_item_remove_offset_node (GimpItem           *item,
                                               GeglNode           *node);
 
-gint            gimp_item_get_ID             (GimpItem           *item);
-GimpItem      * gimp_item_get_by_ID          (Gimp               *gimp,
+gint            gimp_item_get_id             (GimpItem           *item);
+GimpItem      * gimp_item_get_by_id          (Gimp               *gimp,
                                               gint                id);
 
 GimpTattoo      gimp_item_get_tattoo         (GimpItem           *item);
diff --git a/app/core/gimpparamspecs.c b/app/core/gimpparamspecs.c
index 5235c2067a..789436b94a 100644
--- a/app/core/gimpparamspecs.c
+++ b/app/core/gimpparamspecs.c
@@ -427,7 +427,7 @@ gimp_param_image_id_validate (GParamSpec *pspec,
   if (ispec->none_ok && (image_id == 0 || image_id == -1))
     return FALSE;
 
-  image = gimp_image_get_by_ID (ispec->gimp, image_id);
+  image = gimp_image_get_by_id (ispec->gimp, image_id);
 
   if (! GIMP_IS_IMAGE (image))
     {
@@ -484,7 +484,7 @@ gimp_value_get_image (const GValue *value,
   g_return_val_if_fail (GIMP_VALUE_HOLDS_IMAGE_ID (value), NULL);
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
-  return gimp_image_get_by_ID (gimp, value->data[0].v_int);
+  return gimp_image_get_by_id (gimp, value->data[0].v_int);
 }
 
 void
@@ -494,7 +494,7 @@ gimp_value_set_image (GValue    *value,
   g_return_if_fail (GIMP_VALUE_HOLDS_IMAGE_ID (value));
   g_return_if_fail (image == NULL || GIMP_IS_IMAGE (image));
 
-  value->data[0].v_int = image ? gimp_image_get_ID (image) : -1;
+  value->data[0].v_int = image ? gimp_image_get_id (image) : -1;
 }
 
 
@@ -594,7 +594,7 @@ gimp_param_item_id_validate (GParamSpec *pspec,
   if (ispec->none_ok && (item_id == 0 || item_id == -1))
     return FALSE;
 
-  item = gimp_item_get_by_ID (ispec->gimp, item_id);
+  item = gimp_item_get_by_id (ispec->gimp, item_id);
 
   if (! item || ! g_type_is_a (G_TYPE_FROM_INSTANCE (item), ispec->item_type))
     {
@@ -658,7 +658,7 @@ gimp_value_get_item (const GValue *value,
   g_return_val_if_fail (GIMP_VALUE_HOLDS_ITEM_ID (value), NULL);
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
-  item = gimp_item_get_by_ID (gimp, value->data[0].v_int);
+  item = gimp_item_get_by_id (gimp, value->data[0].v_int);
 
   if (item && ! GIMP_IS_ITEM (item))
     return NULL;
@@ -678,7 +678,7 @@ gimp_value_set_item (GValue   *value,
 
   if (GIMP_VALUE_HOLDS_ITEM_ID (value))
     {
-      value->data[0].v_int = item ? gimp_item_get_ID (item) : -1;
+      value->data[0].v_int = item ? gimp_item_get_id (item) : -1;
     }
   else if (GIMP_VALUE_HOLDS_DRAWABLE_ID (value) &&
            (item == NULL || GIMP_IS_DRAWABLE (item)))
@@ -813,7 +813,7 @@ gimp_value_get_drawable (const GValue *value,
   g_return_val_if_fail (GIMP_VALUE_HOLDS_DRAWABLE_ID (value), NULL);
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
-  item = gimp_item_get_by_ID (gimp, value->data[0].v_int);
+  item = gimp_item_get_by_id (gimp, value->data[0].v_int);
 
   if (item && ! GIMP_IS_DRAWABLE (item))
     return NULL;
@@ -830,7 +830,8 @@ gimp_value_set_drawable (GValue       *value,
 
   if (GIMP_VALUE_HOLDS_DRAWABLE_ID (value))
     {
-      value->data[0].v_int = drawable ? gimp_item_get_ID (GIMP_ITEM (drawable)) : -1;
+      value->data[0].v_int =
+        drawable ? gimp_item_get_id (GIMP_ITEM (drawable)) : -1;
     }
   else if (GIMP_VALUE_HOLDS_LAYER_ID (value) &&
            (drawable == NULL || GIMP_IS_LAYER (drawable)))
@@ -955,7 +956,7 @@ gimp_value_get_layer (const GValue *value,
   g_return_val_if_fail (GIMP_VALUE_HOLDS_LAYER_ID (value), NULL);
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
-  item = gimp_item_get_by_ID (gimp, value->data[0].v_int);
+  item = gimp_item_get_by_id (gimp, value->data[0].v_int);
 
   if (item && ! GIMP_IS_LAYER (item))
     return NULL;
@@ -970,7 +971,7 @@ gimp_value_set_layer (GValue    *value,
   g_return_if_fail (GIMP_VALUE_HOLDS_LAYER_ID (value));
   g_return_if_fail (layer == NULL || GIMP_IS_LAYER (layer));
 
-  value->data[0].v_int = layer ? gimp_item_get_ID (GIMP_ITEM (layer)) : -1;
+  value->data[0].v_int = layer ? gimp_item_get_id (GIMP_ITEM (layer)) : -1;
 }
 
 
@@ -1070,7 +1071,7 @@ gimp_value_get_channel (const GValue *value,
   g_return_val_if_fail (GIMP_VALUE_HOLDS_CHANNEL_ID (value), NULL);
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
-  item = gimp_item_get_by_ID (gimp, value->data[0].v_int);
+  item = gimp_item_get_by_id (gimp, value->data[0].v_int);
 
   if (item && ! GIMP_IS_CHANNEL (item))
     return NULL;
@@ -1087,7 +1088,8 @@ gimp_value_set_channel (GValue      *value,
 
   if (GIMP_VALUE_HOLDS_CHANNEL_ID (value))
     {
-      value->data[0].v_int = channel ? gimp_item_get_ID (GIMP_ITEM (channel)) : -1;
+      value->data[0].v_int =
+        channel ? gimp_item_get_id (GIMP_ITEM (channel)) : -1;
     }
   else if (GIMP_VALUE_HOLDS_LAYER_MASK_ID (value) &&
            (channel == NULL || GIMP_IS_LAYER_MASK (channel)))
@@ -1202,7 +1204,7 @@ gimp_value_get_layer_mask (const GValue *value,
   g_return_val_if_fail (GIMP_VALUE_HOLDS_LAYER_MASK_ID (value), NULL);
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
-  item = gimp_item_get_by_ID (gimp, value->data[0].v_int);
+  item = gimp_item_get_by_id (gimp, value->data[0].v_int);
 
   if (item && ! GIMP_IS_LAYER_MASK (item))
     return NULL;
@@ -1217,7 +1219,8 @@ gimp_value_set_layer_mask (GValue        *value,
   g_return_if_fail (GIMP_VALUE_HOLDS_LAYER_MASK_ID (value));
   g_return_if_fail (layer_mask == NULL || GIMP_IS_LAYER_MASK (layer_mask));
 
-  value->data[0].v_int = layer_mask ? gimp_item_get_ID (GIMP_ITEM (layer_mask)) : -1;
+  value->data[0].v_int =
+    layer_mask ? gimp_item_get_id (GIMP_ITEM (layer_mask)) : -1;
 }
 
 
@@ -1317,7 +1320,7 @@ gimp_value_get_selection (const GValue *value,
   g_return_val_if_fail (GIMP_VALUE_HOLDS_SELECTION_ID (value), NULL);
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
-  item = gimp_item_get_by_ID (gimp, value->data[0].v_int);
+  item = gimp_item_get_by_id (gimp, value->data[0].v_int);
 
   if (item && ! GIMP_IS_SELECTION (item))
     return NULL;
@@ -1332,7 +1335,8 @@ gimp_value_set_selection (GValue        *value,
   g_return_if_fail (GIMP_VALUE_HOLDS_SELECTION_ID (value));
   g_return_if_fail (selection == NULL || GIMP_IS_SELECTION (selection));
 
-  value->data[0].v_int = selection ? gimp_item_get_ID (GIMP_ITEM (selection)) : -1;
+  value->data[0].v_int =
+    selection ? gimp_item_get_id (GIMP_ITEM (selection)) : -1;
 }
 
 
@@ -1432,7 +1436,7 @@ gimp_value_get_vectors (const GValue *value,
   g_return_val_if_fail (GIMP_VALUE_HOLDS_VECTORS_ID (value), NULL);
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
-  item = gimp_item_get_by_ID (gimp, value->data[0].v_int);
+  item = gimp_item_get_by_id (gimp, value->data[0].v_int);
 
   if (item && ! GIMP_IS_VECTORS (item))
     return NULL;
@@ -1447,7 +1451,8 @@ gimp_value_set_vectors (GValue      *value,
   g_return_if_fail (GIMP_VALUE_HOLDS_VECTORS_ID (value));
   g_return_if_fail (vectors == NULL || GIMP_IS_VECTORS (vectors));
 
-  value->data[0].v_int = vectors ? gimp_item_get_ID (GIMP_ITEM (vectors)) : -1;
+  value->data[0].v_int =
+    vectors ? gimp_item_get_id (GIMP_ITEM (vectors)) : -1;
 }
 
 
@@ -1546,7 +1551,7 @@ gimp_param_display_id_validate (GParamSpec *pspec,
   if (ispec->none_ok && (display_id == 0 || display_id == -1))
     return FALSE;
 
-  display = gimp_get_display_by_ID (ispec->gimp, display_id);
+  display = gimp_get_display_by_id (ispec->gimp, display_id);
 
   if (! GIMP_IS_OBJECT (display))
     {
@@ -1603,7 +1608,7 @@ gimp_value_get_display (const GValue *value,
   g_return_val_if_fail (GIMP_VALUE_HOLDS_DISPLAY_ID (value), NULL);
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
 
-  return gimp_get_display_by_ID (gimp, value->data[0].v_int);
+  return gimp_get_display_by_id (gimp, value->data[0].v_int);
 }
 
 void
diff --git a/app/core/gimpsymmetry-mandala.c b/app/core/gimpsymmetry-mandala.c
index 7ca469d857..b00366df82 100644
--- a/app/core/gimpsymmetry-mandala.c
+++ b/app/core/gimpsymmetry-mandala.c
@@ -315,7 +315,7 @@ gimp_mandala_add_guide (GimpMandala         *mandala,
   gimp  = image->gimp;
 
   guide = gimp_guide_custom_new (orientation,
-                                 gimp->next_guide_ID++,
+                                 gimp->next_guide_id++,
                                  GIMP_GUIDE_STYLE_MANDALA);
 
   if (orientation == GIMP_ORIENTATION_HORIZONTAL)
diff --git a/app/core/gimpsymmetry-mirror.c b/app/core/gimpsymmetry-mirror.c
index 7f8f8a59d6..7c77072422 100644
--- a/app/core/gimpsymmetry-mirror.c
+++ b/app/core/gimpsymmetry-mirror.c
@@ -428,7 +428,7 @@ gimp_mirror_add_guide (GimpMirror          *mirror,
   gimp  = image->gimp;
 
   guide = gimp_guide_custom_new (orientation,
-                                 gimp->next_guide_ID++,
+                                 gimp->next_guide_id++,
                                  GIMP_GUIDE_STYLE_MIRROR);
 
   if (orientation == GIMP_ORIENTATION_HORIZONTAL)
diff --git a/app/dialogs/palette-import-dialog.c b/app/dialogs/palette-import-dialog.c
index 3e06758136..37aa5a7533 100644
--- a/app/dialogs/palette-import-dialog.c
+++ b/app/dialogs/palette-import-dialog.c
@@ -503,7 +503,7 @@ palette_import_image_changed (GimpContext  *context,
 
           label = g_strdup_printf ("%s-%d",
                                    gimp_image_get_display_name (image),
-                                   gimp_image_get_ID (image));
+                                   gimp_image_get_id (image));
 
           gtk_entry_set_text (GTK_ENTRY (private->entry), label);
           g_free (label);
diff --git a/app/display/gimpdisplay.c b/app/display/gimpdisplay.c
index 8e8c94da39..7c7bfafadb 100644
--- a/app/display/gimpdisplay.c
+++ b/app/display/gimpdisplay.c
@@ -206,12 +206,12 @@ gimp_display_set_property (GObject      *object,
 
         do
           {
-            ID = display->gimp->next_display_ID++;
+            ID = display->gimp->next_display_id++;
 
-            if (display->gimp->next_display_ID == G_MAXINT)
-              display->gimp->next_display_ID = 1;
+            if (display->gimp->next_display_id == G_MAXINT)
+              display->gimp->next_display_id = 1;
           }
-        while (gimp_display_get_by_ID (display->gimp, ID));
+        while (gimp_display_get_by_id (display->gimp, ID));
 
         private->ID = ID;
       }
@@ -549,7 +549,7 @@ gimp_display_close (GimpDisplay *display)
 }
 
 gint
-gimp_display_get_ID (GimpDisplay *display)
+gimp_display_get_id (GimpDisplay *display)
 {
   GimpDisplayPrivate *private;
 
@@ -561,8 +561,8 @@ gimp_display_get_ID (GimpDisplay *display)
 }
 
 GimpDisplay *
-gimp_display_get_by_ID (Gimp *gimp,
-                        gint  ID)
+gimp_display_get_by_id (Gimp *gimp,
+                        gint  id)
 {
   GList *list;
 
@@ -574,7 +574,7 @@ gimp_display_get_by_ID (Gimp *gimp,
     {
       GimpDisplay *display = list->data;
 
-      if (gimp_display_get_ID (display) == ID)
+      if (gimp_display_get_id (display) == id)
         return display;
     }
 
@@ -594,7 +594,7 @@ gimp_display_get_action_name (GimpDisplay *display)
   g_return_val_if_fail (GIMP_IS_DISPLAY (display), NULL);
 
   return g_strdup_printf ("windows-display-%04d",
-                          gimp_display_get_ID (display));
+                          gimp_display_get_id (display));
 }
 
 Gimp *
diff --git a/app/display/gimpdisplay.h b/app/display/gimpdisplay.h
index 8657528ee8..43d70d59b0 100644
--- a/app/display/gimpdisplay.h
+++ b/app/display/gimpdisplay.h
@@ -59,9 +59,9 @@ GimpDisplay      * gimp_display_new             (Gimp              *gimp,
 void               gimp_display_delete          (GimpDisplay       *display);
 void               gimp_display_close           (GimpDisplay       *display);
 
-gint               gimp_display_get_ID          (GimpDisplay       *display);
-GimpDisplay      * gimp_display_get_by_ID       (Gimp              *gimp,
-                                                 gint               ID);
+gint               gimp_display_get_id          (GimpDisplay       *display);
+GimpDisplay      * gimp_display_get_by_id       (Gimp              *gimp,
+                                                 gint               id);
 
 gchar            * gimp_display_get_action_name (GimpDisplay       *display);
 
diff --git a/app/display/gimpdisplayshell-title.c b/app/display/gimpdisplayshell-title.c
index 6078222f3c..4b749bce38 100644
--- a/app/display/gimpdisplayshell-title.c
+++ b/app/display/gimpdisplayshell-title.c
@@ -220,7 +220,7 @@ gimp_display_shell_format_title (GimpDisplayShell *shell,
               break;
 
             case 'p': /* PDB id */
-              i += print (title, title_len, i, "%d", gimp_image_get_ID (image));
+              i += print (title, title_len, i, "%d", gimp_image_get_id (image));
               break;
 
             case 'i': /* instance */
@@ -369,7 +369,7 @@ gimp_display_shell_format_title (GimpDisplayShell *shell,
             case 'P': /* active drawable PDB id */
               if (drawable)
                 i += print (title, title_len, i, "%d",
-                            gimp_item_get_ID (GIMP_ITEM (drawable)));
+                            gimp_item_get_id (GIMP_ITEM (drawable)));
               else
                 i += print (title, title_len, i, "%s", _("(none)"));
               break;
diff --git a/app/errors.c b/app/errors.c
index 7fba23b878..9a141e9362 100644
--- a/app/errors.c
+++ b/app/errors.c
@@ -489,8 +489,8 @@ gimp_eek (const gchar *reason,
                                               NULL, NULL,
                                               "gimp-xcf-save",
                                               GIMP_TYPE_RUN_MODE,    GIMP_RUN_NONINTERACTIVE,
-                                              GIMP_TYPE_IMAGE_ID,    gimp_image_get_ID (image),
-                                              GIMP_TYPE_DRAWABLE_ID, gimp_item_get_ID (item),
+                                              GIMP_TYPE_IMAGE_ID,    gimp_image_get_id (image),
+                                              GIMP_TYPE_DRAWABLE_ID, gimp_item_get_id (item),
                                               G_TYPE_STRING,         backup_path,
                                               G_TYPE_STRING,         backup_path,
                                               G_TYPE_NONE);
diff --git a/app/file/file-save.c b/app/file/file-save.c
index 8ff73eab12..163587172d 100644
--- a/app/file/file-save.c
+++ b/app/file/file-save.c
@@ -69,8 +69,8 @@ file_save (Gimp                *gimp,
   GFile             *local_file = NULL;
   gchar             *uri        = NULL;
   gboolean           mounted    = TRUE;
-  gint32             image_ID;
-  gint32             drawable_ID;
+  gint32             image_id;
+  gint32             drawable_id;
   GError            *my_error   = NULL;
 
   g_return_val_if_fail (GIMP_IS_GIMP (gimp), GIMP_PDB_CALLING_ERROR);
@@ -188,8 +188,8 @@ file_save (Gimp                *gimp,
   if (! uri)
     uri = g_file_get_uri (file);
 
-  image_ID    = gimp_image_get_ID (image);
-  drawable_ID = gimp_item_get_ID (GIMP_ITEM (drawable));
+  image_id    = gimp_image_get_id (image);
+  drawable_id = gimp_item_get_id (GIMP_ITEM (drawable));
 
   return_vals =
     gimp_pdb_execute_procedure_by_name (image->gimp->pdb,
@@ -197,8 +197,8 @@ file_save (Gimp                *gimp,
                                         progress, error,
                                         gimp_object_get_name (file_proc),
                                         GIMP_TYPE_RUN_MODE,    run_mode,
-                                        GIMP_TYPE_IMAGE_ID,    image_ID,
-                                        GIMP_TYPE_DRAWABLE_ID, drawable_ID,
+                                        GIMP_TYPE_IMAGE_ID,    image_id,
+                                        GIMP_TYPE_DRAWABLE_ID, drawable_id,
                                         G_TYPE_STRING,         uri,
                                         G_TYPE_STRING,         uri,
                                         G_TYPE_NONE);
diff --git a/app/gui/gui-vtable.c b/app/gui/gui-vtable.c
index ad7bd3d2ce..09487382f1 100644
--- a/app/gui/gui-vtable.c
+++ b/app/gui/gui-vtable.c
@@ -121,7 +121,7 @@ static void           gui_help                   (Gimp                *gimp,
                                                   const gchar         *help_id);
 static const gchar  * gui_get_program_class      (Gimp                *gimp);
 static gchar        * gui_get_display_name       (Gimp                *gimp,
-                                                  gint                 display_ID,
+                                                  gint                 display_id,
                                                   GObject            **monitor,
                                                   gint                *monitor_number);
 static guint32        gui_get_user_time          (Gimp                *gimp);
@@ -129,9 +129,9 @@ static GFile        * gui_get_theme_dir          (Gimp                *gimp);
 static GFile        * gui_get_icon_theme_dir     (Gimp                *gimp);
 static GimpObject   * gui_get_window_strategy    (Gimp                *gimp);
 static GimpObject   * gui_get_empty_display      (Gimp                *gimp);
-static GimpObject   * gui_display_get_by_ID      (Gimp                *gimp,
+static GimpObject   * gui_display_get_by_id      (Gimp                *gimp,
                                                   gint                 ID);
-static gint           gui_display_get_ID         (GimpObject          *display);
+static gint           gui_display_get_id         (GimpObject          *display);
 static guint32        gui_display_get_window_id  (GimpObject          *display);
 static GimpObject   * gui_display_create         (Gimp                *gimp,
                                                   GimpImage           *image,
@@ -203,8 +203,8 @@ gui_vtable_init (Gimp *gimp)
   gimp->gui.get_icon_theme_dir     = gui_get_icon_theme_dir;
   gimp->gui.get_window_strategy    = gui_get_window_strategy;
   gimp->gui.get_empty_display      = gui_get_empty_display;
-  gimp->gui.display_get_by_id      = gui_display_get_by_ID;
-  gimp->gui.display_get_id         = gui_display_get_ID;
+  gimp->gui.display_get_by_id      = gui_display_get_by_id;
+  gimp->gui.display_get_id         = gui_display_get_id;
   gimp->gui.display_get_window_id  = gui_display_get_window_id;
   gimp->gui.display_create         = gui_display_create;
   gimp->gui.display_delete         = gui_display_delete;
@@ -282,15 +282,15 @@ get_monitor_number (GdkMonitor *monitor)
 
 static gchar *
 gui_get_display_name (Gimp     *gimp,
-                      gint      display_ID,
+                      gint      display_id,
                       GObject **monitor,
                       gint     *monitor_number)
 {
   GimpDisplay *display = NULL;
   GdkDisplay  *gdk_display;
 
-  if (display_ID > 0)
-    display = gimp_display_get_by_ID (gimp, display_ID);
+  if (display_id > 0)
+    display = gimp_display_get_by_id (gimp, display_id);
 
   if (display)
     {
@@ -365,16 +365,16 @@ gui_get_empty_display (Gimp *gimp)
 }
 
 static GimpObject *
-gui_display_get_by_ID (Gimp *gimp,
-                       gint  ID)
+gui_display_get_by_id (Gimp *gimp,
+                       gint  id)
 {
-  return (GimpObject *) gimp_display_get_by_ID (gimp, ID);
+  return (GimpObject *) gimp_display_get_by_id (gimp, id);
 }
 
 static gint
-gui_display_get_ID (GimpObject *display)
+gui_display_get_id (GimpObject *display)
 {
-  return gimp_display_get_ID (GIMP_DISPLAY (display));
+  return gimp_display_get_id (GIMP_DISPLAY (display));
 }
 
 static guint32
diff --git a/app/menus/windows-menu.c b/app/menus/windows-menu.c
index 9e203e0c83..aebdca5966 100644
--- a/app/menus/windows-menu.c
+++ b/app/menus/windows-menu.c
@@ -172,7 +172,7 @@ windows_menu_display_remove (GimpContainer *container,
                              GimpUIManager *manager)
 {
   gchar *merge_key = g_strdup_printf ("windows-display-%04d-merge-id",
-                                      gimp_display_get_ID (display));
+                                      gimp_display_get_id (display));
   guint  merge_id;
 
   merge_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (manager),
@@ -224,7 +224,7 @@ windows_menu_image_notify (GimpDisplay      *display,
   if (gimp_display_get_image (display))
     {
       gchar *merge_key = g_strdup_printf ("windows-display-%04d-merge-id",
-                                          gimp_display_get_ID (display));
+                                          gimp_display_get_id (display));
       guint  merge_id;
 
       merge_id = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (manager),
diff --git a/app/pdb/fileops-cmds.c b/app/pdb/fileops-cmds.c
index d9ea124596..19f5ce81c5 100644
--- a/app/pdb/fileops-cmds.c
+++ b/app/pdb/fileops-cmds.c
@@ -229,7 +229,7 @@ file_load_layers_invoker (GimpProcedure         *procedure,
               for (i = 0, list = layers;
                    i < num_layers;
                    i++, list = g_list_next (list))
-                layer_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+                layer_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
 
               g_list_free (layers);
             }
diff --git a/app/pdb/gimppdb-utils.c b/app/pdb/gimppdb-utils.c
index 7afede7847..16fe883be4 100644
--- a/app/pdb/gimppdb-utils.c
+++ b/app/pdb/gimppdb-utils.c
@@ -442,7 +442,7 @@ gimp_pdb_item_is_attached (GimpItem           *item,
                    _("Item '%s' (%d) cannot be used because it has not "
                      "been added to an image"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item));
+                   gimp_item_get_id (item));
       return FALSE;
     }
 
@@ -452,7 +452,7 @@ gimp_pdb_item_is_attached (GimpItem           *item,
                    _("Item '%s' (%d) cannot be used because it is "
                      "attached to another image"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item));
+                   gimp_item_get_id (item));
       return FALSE;
     }
 
@@ -478,7 +478,7 @@ gimp_pdb_item_is_in_tree (GimpItem           *item,
                    _("Item '%s' (%d) cannot be used because it is not "
                      "a direct child of an item tree"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item));
+                   gimp_item_get_id (item));
       return FALSE;
     }
 
@@ -506,9 +506,9 @@ gimp_pdb_item_is_in_same_tree (GimpItem   *item,
                    _("Items '%s' (%d) and '%s' (%d) cannot be used "
                      "because they are not part of the same item tree"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item),
+                   gimp_item_get_id (item),
                    gimp_object_get_name (item2),
-                   gimp_item_get_ID (item2));
+                   gimp_item_get_id (item2));
       return FALSE;
     }
 
@@ -531,9 +531,9 @@ gimp_pdb_item_is_not_ancestor (GimpItem  *item,
                    _("Item '%s' (%d) must not be an ancestor of "
                      "'%s' (%d)"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item),
+                   gimp_item_get_id (item),
                    gimp_object_get_name (not_descendant),
-                   gimp_item_get_ID (not_descendant));
+                   gimp_item_get_id (not_descendant));
       return FALSE;
     }
 
@@ -554,7 +554,7 @@ gimp_pdb_item_is_floating (GimpItem  *item,
       g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                    _("Item '%s' (%d) has already been added to an image"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item));
+                   gimp_item_get_id (item));
       return FALSE;
     }
   else if (gimp_item_get_image (item) != dest_image)
@@ -562,7 +562,7 @@ gimp_pdb_item_is_floating (GimpItem  *item,
       g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                    _("Trying to add item '%s' (%d) to wrong image"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item));
+                   gimp_item_get_id (item));
       return FALSE;
     }
 
@@ -590,7 +590,7 @@ gimp_pdb_item_is_modifiable (GimpItem           *item,
                    _("Item '%s' (%d) cannot be modified because its "
                      "contents are locked"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item));
+                   gimp_item_get_id (item));
       return FALSE;
     }
 
@@ -600,7 +600,7 @@ gimp_pdb_item_is_modifiable (GimpItem           *item,
                    _("Item '%s' (%d) cannot be modified because its "
                      "position and size are locked"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item));
+                   gimp_item_get_id (item));
       return FALSE;
     }
 
@@ -620,7 +620,7 @@ gimp_pdb_item_is_group (GimpItem  *item,
                    _("Item '%s' (%d) cannot be used because it is "
                      "not a group item"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item));
+                   gimp_item_get_id (item));
       return FALSE;
     }
 
@@ -640,7 +640,7 @@ gimp_pdb_item_is_not_group (GimpItem  *item,
                    _("Item '%s' (%d) cannot be modified because it "
                      "is a group item"),
                    gimp_object_get_name (item),
-                   gimp_item_get_ID (item));
+                   gimp_item_get_id (item));
       return FALSE;
     }
 
@@ -661,7 +661,7 @@ gimp_pdb_layer_is_text_layer (GimpLayer          *layer,
                    _("Layer '%s' (%d) cannot be used because it is not "
                      "a text layer"),
                    gimp_object_get_name (layer),
-                   gimp_item_get_ID (GIMP_ITEM (layer)));
+                   gimp_item_get_id (GIMP_ITEM (layer)));
 
       return FALSE;
     }
@@ -702,7 +702,7 @@ gimp_pdb_image_is_base_type (GimpImage          *image,
                _("Image '%s' (%d) is of type '%s', "
                  "but an image of type '%s' is expected"),
                gimp_image_get_display_name (image),
-               gimp_image_get_ID (image),
+               gimp_image_get_id (image),
                gimp_pdb_enum_value_get_nick (GIMP_TYPE_IMAGE_BASE_TYPE,
                                              gimp_image_get_base_type (image)),
                gimp_pdb_enum_value_get_nick (GIMP_TYPE_IMAGE_BASE_TYPE, type));
@@ -724,7 +724,7 @@ gimp_pdb_image_is_not_base_type (GimpImage          *image,
   g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                _("Image '%s' (%d) must not be of type '%s'"),
                gimp_image_get_display_name (image),
-               gimp_image_get_ID (image),
+               gimp_image_get_id (image),
                gimp_pdb_enum_value_get_nick (GIMP_TYPE_IMAGE_BASE_TYPE, type));
 
   return FALSE;
@@ -745,7 +745,7 @@ gimp_pdb_image_is_precision (GimpImage      *image,
                _("Image '%s' (%d) has precision '%s', "
                  "but an image of precision '%s' is expected"),
                gimp_image_get_display_name (image),
-               gimp_image_get_ID (image),
+               gimp_image_get_id (image),
                gimp_pdb_enum_value_get_nick (GIMP_TYPE_PRECISION,
                                              gimp_image_get_precision (image)),
                gimp_pdb_enum_value_get_nick (GIMP_TYPE_PRECISION, precision));
@@ -767,7 +767,7 @@ gimp_pdb_image_is_not_precision (GimpImage      *image,
   g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                _("Image '%s' (%d) must not be of precision '%s'"),
                gimp_image_get_display_name (image),
-               gimp_image_get_ID (image),
+               gimp_image_get_id (image),
                gimp_pdb_enum_value_get_nick (GIMP_TYPE_PRECISION, precision));
 
   return FALSE;
@@ -775,7 +775,7 @@ gimp_pdb_image_is_not_precision (GimpImage      *image,
 
 GimpGuide *
 gimp_pdb_image_get_guide (GimpImage  *image,
-                          gint        guide_ID,
+                          gint        guide_id,
                           GError    **error)
 {
   GimpGuide *guide;
@@ -783,7 +783,7 @@ gimp_pdb_image_get_guide (GimpImage  *image,
   g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 
-  guide = gimp_image_get_guide (image, guide_ID);
+  guide = gimp_image_get_guide (image, guide_id);
 
   if (guide)
     return guide;
@@ -791,14 +791,14 @@ gimp_pdb_image_get_guide (GimpImage  *image,
   g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                _("Image '%s' (%d) does not contain guide with ID %d"),
                gimp_image_get_display_name (image),
-               gimp_image_get_ID (image),
-               guide_ID);
+               gimp_image_get_id (image),
+               guide_id);
   return NULL;
 }
 
 GimpSamplePoint *
 gimp_pdb_image_get_sample_point (GimpImage  *image,
-                                 gint        sample_point_ID,
+                                 gint        sample_point_id,
                                  GError    **error)
 {
   GimpSamplePoint *sample_point;
@@ -806,7 +806,7 @@ gimp_pdb_image_get_sample_point (GimpImage  *image,
   g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
 
-  sample_point = gimp_image_get_sample_point (image, sample_point_ID);
+  sample_point = gimp_image_get_sample_point (image, sample_point_id);
 
   if (sample_point)
     return sample_point;
@@ -814,14 +814,14 @@ gimp_pdb_image_get_sample_point (GimpImage  *image,
   g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                _("Image '%s' (%d) does not contain sample point with ID %d"),
                gimp_image_get_display_name (image),
-               gimp_image_get_ID (image),
-               sample_point_ID);
+               gimp_image_get_id (image),
+               sample_point_id);
   return NULL;
 }
 
 GimpStroke *
 gimp_pdb_get_vectors_stroke (GimpVectors        *vectors,
-                             gint                stroke_ID,
+                             gint                stroke_id,
                              GimpPDBItemModify   modify,
                              GError            **error)
 {
@@ -836,12 +836,12 @@ gimp_pdb_get_vectors_stroke (GimpVectors        *vectors,
   if (! modify || gimp_pdb_item_is_modifiable (GIMP_ITEM (vectors),
                                                modify, error))
     {
-      stroke = gimp_vectors_stroke_get_by_ID (vectors, stroke_ID);
+      stroke = gimp_vectors_stroke_get_by_id (vectors, stroke_id);
 
       if (! stroke)
         g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                      _("Vectors object %d does not contain stroke with ID %d"),
-                     gimp_item_get_ID (GIMP_ITEM (vectors)), stroke_ID);
+                     gimp_item_get_id (GIMP_ITEM (vectors)), stroke_id);
     }
 
   return stroke;
diff --git a/app/pdb/gimppdb-utils.h b/app/pdb/gimppdb-utils.h
index 0e66664f05..11dccdb4e5 100644
--- a/app/pdb/gimppdb-utils.h
+++ b/app/pdb/gimppdb-utils.h
@@ -101,15 +101,15 @@ gboolean        gimp_pdb_image_is_not_precision (GimpImage          *image,
                                                  GError            **error);
 
 GimpGuide     * gimp_pdb_image_get_guide        (GimpImage          *image,
-                                                 gint                guide_ID,
+                                                 gint                guide_id,
                                                  GError            **error);
 GimpSamplePoint *
                 gimp_pdb_image_get_sample_point (GimpImage          *image,
-                                                 gint                sample_point_ID,
+                                                 gint                sample_point_id,
                                                  GError            **error);
 
 GimpStroke    * gimp_pdb_get_vectors_stroke     (GimpVectors        *vectors,
-                                                 gint                stroke_ID,
+                                                 gint                stroke_id,
                                                  GimpPDBItemModify   modify,
                                                  GError            **error);
 
diff --git a/app/pdb/image-cmds.c b/app/pdb/image-cmds.c
index a0b8b4a84b..c28d9c84b3 100644
--- a/app/pdb/image-cmds.c
+++ b/app/pdb/image-cmds.c
@@ -123,7 +123,7 @@ image_list_invoker (GimpProcedure         *procedure,
       image_ids = g_new (gint32, num_images);
 
       for (i = 0; i < num_images; i++, list = g_list_next (list))
-        image_ids[i] = gimp_image_get_ID (GIMP_IMAGE (list->data));
+        image_ids[i] = gimp_image_get_id (GIMP_IMAGE (list->data));
     }
 
   return_vals = gimp_procedure_get_return_values (procedure, TRUE, NULL);
@@ -445,7 +445,7 @@ image_get_layers_invoker (GimpProcedure         *procedure,
           layer_ids = g_new (gint32, num_layers);
 
           for (i = 0; i < num_layers; i++, list = g_list_next (list))
-            layer_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+            layer_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
         }
     }
 
@@ -490,7 +490,7 @@ image_get_channels_invoker (GimpProcedure         *procedure,
           channel_ids = g_new (gint32, num_channels);
 
           for (i = 0; i < num_channels; i++, list = g_list_next (list))
-            channel_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+            channel_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
         }
     }
 
@@ -535,7 +535,7 @@ image_get_vectors_invoker (GimpProcedure         *procedure,
           vector_ids = g_new (gint32, num_vectors);
 
           for (i = 0; i < num_vectors; i++, list = g_list_next (list))
-            vector_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+            vector_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
         }
     }
 
diff --git a/app/pdb/image-guides-cmds.c b/app/pdb/image-guides-cmds.c
index 4427607889..81a224cf79 100644
--- a/app/pdb/image-guides-cmds.c
+++ b/app/pdb/image-guides-cmds.c
@@ -67,7 +67,7 @@ image_add_hguide_invoker (GimpProcedure         *procedure,
           GimpGuide *g;
 
           g = gimp_image_add_hguide (image, yposition, TRUE);
-          guide = gimp_aux_item_get_ID (GIMP_AUX_ITEM (g));
+          guide = gimp_aux_item_get_id (GIMP_AUX_ITEM (g));
         }
       else
         success = FALSE;
@@ -106,7 +106,7 @@ image_add_vguide_invoker (GimpProcedure         *procedure,
           GimpGuide *g;
 
           g = gimp_image_add_vguide (image, xposition, TRUE);
-          guide = gimp_aux_item_get_ID (GIMP_AUX_ITEM (g));
+          guide = gimp_aux_item_get_id (GIMP_AUX_ITEM (g));
         }
       else
         success = FALSE;
@@ -172,13 +172,13 @@ image_find_next_guide_invoker (GimpProcedure         *procedure,
       GimpGuide *g = gimp_image_get_next_guide (image, guide, &success);
 
       if (g)
-        next_guide = gimp_aux_item_get_ID (GIMP_AUX_ITEM (g));
+        next_guide = gimp_aux_item_get_id (GIMP_AUX_ITEM (g));
 
       if (! success)
         g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                      _("Image '%s' (%d) does not contain guide with ID %d"),
                      gimp_image_get_display_name (image),
-                     gimp_image_get_ID (image),
+                     gimp_image_get_id (image),
                      guide);
     }
 
diff --git a/app/pdb/image-sample-points-cmds.c b/app/pdb/image-sample-points-cmds.c
index 6dd1ef2015..6491fa4868 100644
--- a/app/pdb/image-sample-points-cmds.c
+++ b/app/pdb/image-sample-points-cmds.c
@@ -69,7 +69,7 @@ image_add_sample_point_invoker (GimpProcedure         *procedure,
 
           sp = gimp_image_add_sample_point_at_pos (image, position_x, position_y,
                                                    TRUE);
-          sample_point = gimp_aux_item_get_ID (GIMP_AUX_ITEM (sp));
+          sample_point = gimp_aux_item_get_id (GIMP_AUX_ITEM (sp));
         }
       else
         success = FALSE;
@@ -137,13 +137,13 @@ image_find_next_sample_point_invoker (GimpProcedure         *procedure,
                                                               &success);
 
       if (sp)
-        next_sample_point = gimp_aux_item_get_ID (GIMP_AUX_ITEM (sp));
+        next_sample_point = gimp_aux_item_get_id (GIMP_AUX_ITEM (sp));
 
       if (! success)
         g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                      _("Image '%s' (%d) does not contain sample point with ID %d"),
                      gimp_image_get_display_name (image),
-                     gimp_image_get_ID (image),
+                     gimp_image_get_id (image),
                      sample_point);
     }
 
diff --git a/app/pdb/item-cmds.c b/app/pdb/item-cmds.c
index 68854bbf60..eba1e40477 100644
--- a/app/pdb/item-cmds.c
+++ b/app/pdb/item-cmds.c
@@ -423,7 +423,7 @@ item_get_children_invoker (GimpProcedure         *procedure,
                    list;
                    list = g_list_next (list), i++)
                 {
-                  child_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+                  child_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
                 }
             }
         }
diff --git a/app/pdb/vectors-cmds.c b/app/pdb/vectors-cmds.c
index bea6b5f460..f18ee3c038 100644
--- a/app/pdb/vectors-cmds.c
+++ b/app/pdb/vectors-cmds.c
@@ -190,7 +190,7 @@ vectors_get_strokes_invoker (GimpProcedure         *procedure,
                cur_stroke;
                cur_stroke = gimp_vectors_stroke_get_next (vectors, cur_stroke))
             {
-              stroke_ids[i] = gimp_stroke_get_ID (cur_stroke);
+              stroke_ids[i] = gimp_stroke_get_id (cur_stroke);
               i++;
             }
         }
@@ -730,7 +730,7 @@ vectors_stroke_new_from_points_invoker (GimpProcedure         *procedure,
               gimp_vectors_stroke_add (vectors, stroke);
               g_object_unref (stroke);
 
-              stroke_id = gimp_stroke_get_ID (stroke);
+              stroke_id = gimp_stroke_get_id (stroke);
 
               success = TRUE;
             }
@@ -854,7 +854,7 @@ vectors_bezier_stroke_new_moveto_invoker (GimpProcedure         *procedure,
           gimp_vectors_stroke_add (vectors, stroke);
           g_object_unref (stroke);
 
-          stroke_id = gimp_stroke_get_ID (stroke);
+          stroke_id = gimp_stroke_get_id (stroke);
         }
       else
         success = FALSE;
@@ -1084,7 +1084,7 @@ vectors_bezier_stroke_new_ellipse_invoker (GimpProcedure         *procedure,
           gimp_vectors_stroke_add (vectors, stroke);
           g_object_unref (stroke);
 
-          stroke_id = gimp_stroke_get_ID (stroke);
+          stroke_id = gimp_stroke_get_id (stroke);
         }
       else
         success = FALSE;
@@ -1146,7 +1146,7 @@ vectors_import_from_file_invoker (GimpProcedure         *procedure,
 
               list = vectors_list;
               for (i = 0; i < num_vectors; i++, list = g_list_next (list))
-                vectors_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+                vectors_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
 
               g_list_free (vectors_list);
             }
@@ -1210,7 +1210,7 @@ vectors_import_from_string_invoker (GimpProcedure         *procedure,
 
               list = vectors_list;
               for (i = 0; i < num_vectors; i++, list = g_list_next (list))
-                vectors_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+                vectors_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
 
               g_list_free (vectors_list);
             }
diff --git a/app/plug-in/gimpplugin-cleanup.c b/app/plug-in/gimpplugin-cleanup.c
index 8c8d6d60d8..a15c4bce0f 100644
--- a/app/plug-in/gimpplugin-cleanup.c
+++ b/app/plug-in/gimpplugin-cleanup.c
@@ -45,7 +45,7 @@ typedef struct _GimpPlugInCleanupImage GimpPlugInCleanupImage;
 struct _GimpPlugInCleanupImage
 {
   GimpImage *image;
-  gint       image_ID;
+  gint       image_id;
 
   gint       undo_group_count;
   gint       layers_freeze_count;
@@ -59,7 +59,7 @@ typedef struct _GimpPlugInCleanupItem GimpPlugInCleanupItem;
 struct _GimpPlugInCleanupItem
 {
   GimpItem *item;
-  gint      item_ID;
+  gint      item_id;
 
   gboolean  shadow_buffer;
 };
@@ -357,8 +357,8 @@ gimp_plug_in_cleanup (GimpPlugIn          *plug_in,
     {
       GimpPlugInCleanupImage *cleanup = proc_frame->image_cleanups->data;
 
-      if (gimp_image_get_by_ID (plug_in->manager->gimp,
-                                cleanup->image_ID) == cleanup->image)
+      if (gimp_image_get_by_id (plug_in->manager->gimp,
+                                cleanup->image_id) == cleanup->image)
         {
           gimp_plug_in_cleanup_image (proc_frame, cleanup);
         }
@@ -370,8 +370,8 @@ gimp_plug_in_cleanup (GimpPlugIn          *plug_in,
     {
       GimpPlugInCleanupItem *cleanup = proc_frame->item_cleanups->data;
 
-      if (gimp_item_get_by_ID (plug_in->manager->gimp,
-                               cleanup->item_ID) == cleanup->item)
+      if (gimp_item_get_by_id (plug_in->manager->gimp,
+                               cleanup->item_id) == cleanup->item)
         {
           gimp_plug_in_cleanup_item (proc_frame, cleanup);
         }
@@ -390,7 +390,7 @@ gimp_plug_in_cleanup_image_new (GimpPlugInProcFrame *proc_frame,
   GimpPlugInCleanupImage *cleanup = g_slice_new0 (GimpPlugInCleanupImage);
 
   cleanup->image    = image;
-  cleanup->image_ID = gimp_image_get_ID (image);
+  cleanup->image_id = gimp_image_get_id (image);
 
   proc_frame->image_cleanups = g_list_prepend (proc_frame->image_cleanups,
                                                cleanup);
@@ -514,7 +514,7 @@ gimp_plug_in_cleanup_item_new (GimpPlugInProcFrame *proc_frame,
   GimpPlugInCleanupItem *cleanup = g_slice_new0 (GimpPlugInCleanupItem);
 
   cleanup->item    = item;
-  cleanup->item_ID = gimp_item_get_ID (item);
+  cleanup->item_id = gimp_item_get_id (item);
 
   proc_frame->item_cleanups = g_list_remove (proc_frame->item_cleanups,
                                              cleanup);
diff --git a/app/plug-in/gimpplugin-message.c b/app/plug-in/gimpplugin-message.c
index 7040a6322b..2b7232ac35 100644
--- a/app/plug-in/gimpplugin-message.c
+++ b/app/plug-in/gimpplugin-message.c
@@ -178,7 +178,7 @@ gimp_plug_in_handle_tile_request (GimpPlugIn *plug_in,
 {
   g_return_if_fail (request != NULL);
 
-  if (request->drawable_ID == -1)
+  if (request->drawable_id == -1)
     gimp_plug_in_handle_tile_put (plug_in, request);
   else
     gimp_plug_in_handle_tile_get (plug_in, request);
@@ -196,7 +196,7 @@ gimp_plug_in_handle_tile_put (GimpPlugIn *plug_in,
   const Babl      *format;
   GeglRectangle    tile_rect;
 
-  tile_data.drawable_ID = -1;
+  tile_data.drawable_id = -1;
   tile_data.tile_num    = 0;
   tile_data.shadow      = 0;
   tile_data.bpp         = 0;
@@ -231,8 +231,8 @@ gimp_plug_in_handle_tile_put (GimpPlugIn *plug_in,
 
   tile_info = msg.data;
 
-  drawable = (GimpDrawable *) gimp_item_get_by_ID (plug_in->manager->gimp,
-                                                   tile_info->drawable_ID);
+  drawable = (GimpDrawable *) gimp_item_get_by_id (plug_in->manager->gimp,
+                                                   tile_info->drawable_id);
 
   if (! GIMP_IS_DRAWABLE (drawable))
     {
@@ -241,7 +241,7 @@ gimp_plug_in_handle_tile_put (GimpPlugIn *plug_in,
                     "tried writing to invalid drawable %d (killing)",
                     gimp_object_get_name (plug_in),
                     gimp_file_get_utf8_name (plug_in->file),
-                    tile_info->drawable_ID);
+                    tile_info->drawable_id);
       gimp_plug_in_close (plug_in, TRUE);
       return;
     }
@@ -253,7 +253,7 @@ gimp_plug_in_handle_tile_put (GimpPlugIn *plug_in,
                     "from the image (killing)",
                     gimp_object_get_name (plug_in),
                     gimp_file_get_utf8_name (plug_in->file),
-                    tile_info->drawable_ID);
+                    tile_info->drawable_id);
       gimp_plug_in_close (plug_in, TRUE);
       return;
     }
@@ -279,7 +279,7 @@ gimp_plug_in_handle_tile_put (GimpPlugIn *plug_in,
                         "tried writing to a locked drawable %d (killing)",
                         gimp_object_get_name (plug_in),
                         gimp_file_get_utf8_name (plug_in->file),
-                        tile_info->drawable_ID);
+                        tile_info->drawable_id);
           gimp_plug_in_close (plug_in, TRUE);
           return;
         }
@@ -290,7 +290,7 @@ gimp_plug_in_handle_tile_put (GimpPlugIn *plug_in,
                         "tried writing to a group layer %d (killing)",
                         gimp_object_get_name (plug_in),
                         gimp_file_get_utf8_name (plug_in->file),
-                        tile_info->drawable_ID);
+                        tile_info->drawable_id);
           gimp_plug_in_close (plug_in, TRUE);
           return;
         }
@@ -351,8 +351,8 @@ gimp_plug_in_handle_tile_get (GimpPlugIn *plug_in,
   GeglRectangle    tile_rect;
   gint             tile_size;
 
-  drawable = (GimpDrawable *) gimp_item_get_by_ID (plug_in->manager->gimp,
-                                                   request->drawable_ID);
+  drawable = (GimpDrawable *) gimp_item_get_by_id (plug_in->manager->gimp,
+                                                   request->drawable_id);
 
   if (! GIMP_IS_DRAWABLE (drawable))
     {
@@ -361,7 +361,7 @@ gimp_plug_in_handle_tile_get (GimpPlugIn *plug_in,
                     "tried reading from invalid drawable %d (killing)",
                     gimp_object_get_name (plug_in),
                     gimp_file_get_utf8_name (plug_in->file),
-                    request->drawable_ID);
+                    request->drawable_id);
       gimp_plug_in_close (plug_in, TRUE);
       return;
     }
@@ -373,7 +373,7 @@ gimp_plug_in_handle_tile_get (GimpPlugIn *plug_in,
                     "from the image (killing)",
                     gimp_object_get_name (plug_in),
                     gimp_file_get_utf8_name (plug_in->file),
-                    request->drawable_ID);
+                    request->drawable_id);
       gimp_plug_in_close (plug_in, TRUE);
       return;
     }
@@ -409,7 +409,7 @@ gimp_plug_in_handle_tile_get (GimpPlugIn *plug_in,
   tile_size = (babl_format_get_bytes_per_pixel (format) *
                tile_rect.width * tile_rect.height);
 
-  tile_data.drawable_ID = request->drawable_ID;
+  tile_data.drawable_id = request->drawable_id;
   tile_data.tile_num    = request->tile_num;
   tile_data.shadow      = request->shadow;
   tile_data.bpp         = babl_format_get_bytes_per_pixel (format);
diff --git a/app/plug-in/gimppluginmanager-call.c b/app/plug-in/gimppluginmanager-call.c
index f3d51dee12..ef16d9b638 100644
--- a/app/plug-in/gimppluginmanager-call.c
+++ b/app/plug-in/gimppluginmanager-call.c
@@ -173,7 +173,7 @@ gimp_plug_in_manager_call_run (GimpPlugInManager   *manager,
       GimpGuiConfig     *gui_config     = GIMP_GUI_CONFIG (core_config);
       GPConfig           config;
       GPProcRun          proc_run;
-      gint               display_ID;
+      gint               display_id;
       GObject           *monitor;
       GFile             *icon_theme_dir;
 
@@ -194,14 +194,14 @@ gimp_plug_in_manager_call_run (GimpPlugInManager   *manager,
           return return_vals;
         }
 
-      display_ID = display ? gimp_get_display_ID (manager->gimp, display) : -1;
+      display_id = display ? gimp_get_display_id (manager->gimp, display) : -1;
 
       icon_theme_dir = gimp_get_icon_theme_dir (manager->gimp);
 
       config.tile_width       = GIMP_PLUG_IN_TILE_WIDTH;
       config.tile_height      = GIMP_PLUG_IN_TILE_HEIGHT;
-      config.shm_ID           = (manager->shm ?
-                                 gimp_plug_in_shm_get_ID (manager->shm) : -1);
+      config.shm_id           = (manager->shm ?
+                                 gimp_plug_in_shm_get_id (manager->shm) : -1);
       config.check_size       = display_config->transparency_size;
       config.check_type       = display_config->transparency_type;
       config.show_help_button = (gui_config->use_help &&
@@ -212,11 +212,11 @@ gimp_plug_in_manager_call_run (GimpPlugInManager   *manager,
       config.export_exif      = core_config->export_metadata_exif;
       config.export_xmp       = core_config->export_metadata_xmp;
       config.export_iptc      = core_config->export_metadata_iptc;
-      config.gdisp_ID         = display_ID;
+      config.gdisp_id         = display_id;
       config.app_name         = (gchar *) g_get_application_name ();
       config.wm_class         = (gchar *) gimp_get_program_class (manager->gimp);
       config.display_name     = gimp_get_display_name (manager->gimp,
-                                                       display_ID,
+                                                       display_id,
                                                        &monitor,
                                                        &config.monitor_number);
       config.timestamp        = gimp_get_user_time (manager->gimp);
diff --git a/app/plug-in/gimppluginshm.c b/app/plug-in/gimppluginshm.c
index 8f92905c35..c929c2fe58 100644
--- a/app/plug-in/gimppluginshm.c
+++ b/app/plug-in/gimppluginshm.c
@@ -78,7 +78,7 @@
 
 struct _GimpPlugInShm
 {
-  gint    shm_ID;
+  gint    shm_id;
   guchar *shm_addr;
 
 #if defined(USE_WIN32_SHM)
@@ -97,29 +97,29 @@ gimp_plug_in_shm_new (void)
 
   GimpPlugInShm *shm = g_slice_new0 (GimpPlugInShm);
 
-  shm->shm_ID = -1;
+  shm->shm_id = -1;
 
 #if defined(USE_SYSV_SHM)
 
   /* Use SysV shared memory mechanisms for transferring tile data. */
   {
-    shm->shm_ID = shmget (IPC_PRIVATE, TILE_MAP_SIZE, IPC_CREAT | 0600);
+    shm->shm_id = shmget (IPC_PRIVATE, TILE_MAP_SIZE, IPC_CREAT | 0600);
 
-    if (shm->shm_ID != -1)
+    if (shm->shm_id != -1)
       {
-        shm->shm_addr = (guchar *) shmat (shm->shm_ID, NULL, 0);
+        shm->shm_addr = (guchar *) shmat (shm->shm_id, NULL, 0);
 
         if (shm->shm_addr == (guchar *) -1)
           {
             g_printerr ("shmat() failed: %s\n" ERRMSG_SHM_DISABLE,
                         g_strerror (errno));
-            shmctl (shm->shm_ID, IPC_RMID, NULL);
-            shm->shm_ID = -1;
+            shmctl (shm->shm_id, IPC_RMID, NULL);
+            shm->shm_id = -1;
           }
 
 #ifdef IPC_RMID_DEFERRED_RELEASE
         if (shm->shm_addr != (guchar *) -1)
-          shmctl (shm->shm_ID, IPC_RMID, NULL);
+          shmctl (shm->shm_id, IPC_RMID, NULL);
 #endif
       }
     else
@@ -158,7 +158,7 @@ gimp_plug_in_shm_new (void)
         /* Verify that we mapped our view */
         if (shm->shm_addr)
           {
-            shm->shm_ID = pid;
+            shm->shm_id = pid;
           }
         else
           {
@@ -202,7 +202,7 @@ gimp_plug_in_shm_new (void)
             /* Verify that we mapped our view */
             if (shm->shm_addr != MAP_FAILED)
               {
-                shm->shm_ID = pid;
+                shm->shm_id = pid;
               }
             else
               {
@@ -231,14 +231,14 @@ gimp_plug_in_shm_new (void)
 
 #endif
 
-  if (shm->shm_ID == -1)
+  if (shm->shm_id == -1)
     {
       g_slice_free (GimpPlugInShm, shm);
       shm = NULL;
     }
   else
     {
-      GIMP_LOG (SHM, "attached shared memory segment ID = %d", shm->shm_ID);
+      GIMP_LOG (SHM, "attached shared memory segment ID = %d", shm->shm_id);
     }
 
   return shm;
@@ -249,7 +249,7 @@ gimp_plug_in_shm_free (GimpPlugInShm *shm)
 {
   g_return_if_fail (shm != NULL);
 
-  if (shm->shm_ID != -1)
+  if (shm->shm_id != -1)
     {
 
 #if defined (USE_SYSV_SHM)
@@ -257,7 +257,7 @@ gimp_plug_in_shm_free (GimpPlugInShm *shm)
       shmdt (shm->shm_addr);
 
 #ifndef IPC_RMID_DEFERRED_RELEASE
-      shmctl (shm->shm_ID, IPC_RMID, NULL);
+      shmctl (shm->shm_id, IPC_RMID, NULL);
 #endif
 
 #elif defined(USE_WIN32_SHM)
@@ -272,24 +272,24 @@ gimp_plug_in_shm_free (GimpPlugInShm *shm)
       munmap (shm->shm_addr, TILE_MAP_SIZE);
 
       g_snprintf (shm_handle, sizeof (shm_handle), "/gimp-shm-%d",
-                  shm->shm_ID);
+                  shm->shm_id);
 
       shm_unlink (shm_handle);
 
 #endif
 
-      GIMP_LOG (SHM, "detached shared memory segment ID = %d", shm->shm_ID);
+      GIMP_LOG (SHM, "detached shared memory segment ID = %d", shm->shm_id);
     }
 
   g_slice_free (GimpPlugInShm, shm);
 }
 
 gint
-gimp_plug_in_shm_get_ID (GimpPlugInShm *shm)
+gimp_plug_in_shm_get_id (GimpPlugInShm *shm)
 {
   g_return_val_if_fail (shm != NULL, -1);
 
-  return shm->shm_ID;
+  return shm->shm_id;
 }
 
 guchar *
diff --git a/app/plug-in/gimppluginshm.h b/app/plug-in/gimppluginshm.h
index ee89918878..d50dd3a38e 100644
--- a/app/plug-in/gimppluginshm.h
+++ b/app/plug-in/gimppluginshm.h
@@ -24,7 +24,7 @@
 GimpPlugInShm * gimp_plug_in_shm_new      (void);
 void            gimp_plug_in_shm_free     (GimpPlugInShm *shm);
 
-gint            gimp_plug_in_shm_get_ID   (GimpPlugInShm *shm);
+gint            gimp_plug_in_shm_get_id   (GimpPlugInShm *shm);
 guchar        * gimp_plug_in_shm_get_addr (GimpPlugInShm *shm);
 
 
diff --git a/app/tools/gimpfiltertool.c b/app/tools/gimpfiltertool.c
index 0bf2991344..78584107bd 100644
--- a/app/tools/gimpfiltertool.c
+++ b/app/tools/gimpfiltertool.c
@@ -1257,7 +1257,7 @@ gimp_filter_tool_add_guide (GimpFilterTool *filter_tool)
 
   filter_tool->preview_guide =
     gimp_guide_custom_new (orientation,
-                           image->gimp->next_guide_ID++,
+                           image->gimp->next_guide_id++,
                            GIMP_GUIDE_STYLE_SPLIT_VIEW);
 
   gimp_image_add_guide (image, filter_tool->preview_guide, position);
diff --git a/app/vectors/gimpstroke.c b/app/vectors/gimpstroke.c
index 13db273440..6d1f1159fa 100644
--- a/app/vectors/gimpstroke.c
+++ b/app/vectors/gimpstroke.c
@@ -357,21 +357,21 @@ gimp_stroke_get_memsize (GimpObject *object,
 }
 
 void
-gimp_stroke_set_ID (GimpStroke *stroke,
+gimp_stroke_set_id (GimpStroke *stroke,
                     gint        id)
 {
   g_return_if_fail (GIMP_IS_STROKE (stroke));
-  g_return_if_fail (stroke->ID == 0 /* we don't want changing IDs... */);
+  g_return_if_fail (stroke->id == 0 /* we don't want changing IDs... */);
 
-  stroke->ID = id;
+  stroke->id = id;
 }
 
 gint
-gimp_stroke_get_ID (GimpStroke *stroke)
+gimp_stroke_get_id (GimpStroke *stroke)
 {
   g_return_val_if_fail (GIMP_IS_STROKE (stroke), -1);
 
-  return stroke->ID;
+  return stroke->id;
 }
 
 
@@ -1193,7 +1193,7 @@ gimp_stroke_real_transform (GimpStroke        *stroke,
 
   if (ret_strokes)
     {
-      stroke->ID = 0;
+      stroke->id = 0;
 
       g_queue_push_tail (ret_strokes, g_object_ref (stroke));
     }
diff --git a/app/vectors/gimpstroke.h b/app/vectors/gimpstroke.h
index f44b9ab9cc..b220d77f35 100644
--- a/app/vectors/gimpstroke.h
+++ b/app/vectors/gimpstroke.h
@@ -37,7 +37,7 @@ typedef struct _GimpStrokeClass GimpStrokeClass;
 struct _GimpStroke
 {
   GimpObject  parent_instance;
-  gint        ID;
+  gint        id;
 
   GQueue     *anchors;
 
@@ -182,9 +182,9 @@ struct _GimpStrokeClass
 
 GType        gimp_stroke_get_type             (void) G_GNUC_CONST;
 
-void         gimp_stroke_set_ID               (GimpStroke            *stroke,
+void         gimp_stroke_set_id               (GimpStroke            *stroke,
                                                gint                   id);
-gint         gimp_stroke_get_ID               (GimpStroke            *stroke);
+gint         gimp_stroke_get_id               (GimpStroke            *stroke);
 
 
 /* accessing / modifying the anchors */
diff --git a/app/vectors/gimpvectors.c b/app/vectors/gimpvectors.c
index 1a65eac3c1..642b8c9dbe 100644
--- a/app/vectors/gimpvectors.c
+++ b/app/vectors/gimpvectors.c
@@ -269,7 +269,7 @@ gimp_vectors_init (GimpVectors *vectors)
 
   vectors->strokes        = g_queue_new ();
   vectors->stroke_to_list = g_hash_table_new (g_direct_hash, g_direct_equal);
-  vectors->last_stroke_ID = 0;
+  vectors->last_stroke_id = 0;
   vectors->freeze_count   = 0;
   vectors->precision      = 0.2;
 
@@ -640,7 +640,7 @@ gimp_vectors_transform (GimpItem               *item,
       g_object_unref (stroke);
     }
 
-  vectors->last_stroke_ID = 0;
+  vectors->last_stroke_id = 0;
 
   for (list = strokes.head; list; list = g_list_next (list))
     {
@@ -842,7 +842,7 @@ gimp_vectors_copy_strokes (GimpVectors *src_vectors,
   dest_vectors->strokes = g_queue_new ();
   g_hash_table_remove_all (dest_vectors->stroke_to_list);
 
-  dest_vectors->last_stroke_ID = 0;
+  dest_vectors->last_stroke_id = 0;
 
   gimp_vectors_add_strokes (src_vectors, dest_vectors);
 
@@ -874,9 +874,9 @@ gimp_vectors_add_strokes (GimpVectors *src_vectors,
                            newstroke,
                            g_queue_peek_tail_link (dest_vectors->strokes));
 
-      dest_vectors->last_stroke_ID++;
-      gimp_stroke_set_ID (newstroke,
-                          dest_vectors->last_stroke_ID);
+      dest_vectors->last_stroke_id++;
+      gimp_stroke_set_id (newstroke,
+                          dest_vectors->last_stroke_id);
     }
 
   gimp_vectors_thaw (dest_vectors);
@@ -912,8 +912,8 @@ gimp_vectors_real_stroke_add (GimpVectors *vectors,
                        stroke,
                        g_queue_peek_tail_link (vectors->strokes));
 
-  vectors->last_stroke_ID++;
-  gimp_stroke_set_ID (stroke, vectors->last_stroke_ID);
+  vectors->last_stroke_id++;
+  gimp_stroke_set_id (stroke, vectors->last_stroke_id);
 }
 
 void
@@ -992,7 +992,7 @@ gimp_vectors_real_stroke_get (GimpVectors      *vectors,
 }
 
 GimpStroke *
-gimp_vectors_stroke_get_by_ID (GimpVectors *vectors,
+gimp_vectors_stroke_get_by_id (GimpVectors *vectors,
                                gint         id)
 {
   GList *list;
@@ -1001,7 +1001,7 @@ gimp_vectors_stroke_get_by_ID (GimpVectors *vectors,
 
   for (list = vectors->strokes->head; list; list = g_list_next (list))
     {
-      if (gimp_stroke_get_ID (list->data) == id)
+      if (gimp_stroke_get_id (list->data) == id)
         return list->data;
     }
 
diff --git a/app/vectors/gimpvectors.h b/app/vectors/gimpvectors.h
index a0d8a64464..bafa0505cd 100644
--- a/app/vectors/gimpvectors.h
+++ b/app/vectors/gimpvectors.h
@@ -39,7 +39,7 @@ struct _GimpVectors
 
   GQueue         *strokes;        /* Queue of GimpStrokes         */
   GHashTable     *stroke_to_list; /* Map from GimpStroke to strokes listnode */
-  gint            last_stroke_ID;
+  gint            last_stroke_id;
 
   gint            freeze_count;
   gdouble         precision;
@@ -151,7 +151,7 @@ void            gimp_vectors_stroke_remove      (GimpVectors        *vectors,
 gint            gimp_vectors_get_n_strokes      (GimpVectors        *vectors);
 GimpStroke    * gimp_vectors_stroke_get         (GimpVectors        *vectors,
                                                  const GimpCoords   *coord);
-GimpStroke    * gimp_vectors_stroke_get_by_ID   (GimpVectors        *vectors,
+GimpStroke    * gimp_vectors_stroke_get_by_id   (GimpVectors        *vectors,
                                                  gint                id);
 
 /* prev == NULL: "first" stroke */
diff --git a/app/widgets/gimpselectiondata.c b/app/widgets/gimpselectiondata.c
index 0a9da2d54c..ad4210e6d5 100644
--- a/app/widgets/gimpselectiondata.c
+++ b/app/widgets/gimpselectiondata.c
@@ -491,7 +491,7 @@ gimp_selection_data_set_image (GtkSelectionData *selection,
   g_return_if_fail (selection != NULL);
   g_return_if_fail (GIMP_IS_IMAGE (image));
 
-  str = g_strdup_printf ("%d:%d", gimp_get_pid (), gimp_image_get_ID (image));
+  str = g_strdup_printf ("%d:%d", gimp_get_pid (), gimp_image_get_id (image));
 
   gtk_selection_data_set (selection,
                           gtk_selection_data_get_target (selection),
@@ -519,7 +519,7 @@ gimp_selection_data_get_image (GtkSelectionData *selection,
       if (sscanf (str, "%i:%i", &pid, &ID) == 2 &&
           pid == gimp_get_pid ())
         {
-          return gimp_image_get_by_ID (gimp, ID);
+          return gimp_image_get_by_id (gimp, ID);
         }
     }
 
@@ -536,7 +536,7 @@ gimp_selection_data_set_component (GtkSelectionData *selection,
   g_return_if_fail (selection != NULL);
   g_return_if_fail (GIMP_IS_IMAGE (image));
 
-  str = g_strdup_printf ("%d:%d:%d", gimp_get_pid (), gimp_image_get_ID (image),
+  str = g_strdup_printf ("%d:%d:%d", gimp_get_pid (), gimp_image_get_id (image),
                          (gint) channel);
 
   gtk_selection_data_set (selection,
@@ -570,7 +570,7 @@ gimp_selection_data_get_component (GtkSelectionData *selection,
       if (sscanf (str, "%i:%i:%i", &pid, &ID, &ch) == 3 &&
           pid == gimp_get_pid ())
         {
-          GimpImage *image = gimp_image_get_by_ID (gimp, ID);
+          GimpImage *image = gimp_image_get_by_id (gimp, ID);
 
           if (image && channel)
             *channel = ch;
@@ -591,7 +591,7 @@ gimp_selection_data_set_item (GtkSelectionData *selection,
   g_return_if_fail (selection != NULL);
   g_return_if_fail (GIMP_IS_ITEM (item));
 
-  str = g_strdup_printf ("%d:%d", gimp_get_pid (), gimp_item_get_ID (item));
+  str = g_strdup_printf ("%d:%d", gimp_get_pid (), gimp_item_get_id (item));
 
   gtk_selection_data_set (selection,
                           gtk_selection_data_get_target (selection),
@@ -619,7 +619,7 @@ gimp_selection_data_get_item (GtkSelectionData *selection,
       if (sscanf (str, "%i:%i", &pid, &ID) == 2 &&
           pid == gimp_get_pid ())
         {
-          return gimp_item_get_by_ID (gimp, ID);
+          return gimp_item_get_by_id (gimp, ID);
         }
     }
 
diff --git a/app/widgets/gimpviewabledialog.c b/app/widgets/gimpviewabledialog.c
index 295b8637fe..c26a157154 100644
--- a/app/widgets/gimpviewabledialog.c
+++ b/app/widgets/gimpviewabledialog.c
@@ -368,7 +368,7 @@ gimp_viewable_dialog_name_changed (GimpObject         *object,
       tmp = name;
       name = g_strdup_printf ("%s-%d (%s)",
                               tmp,
-                              gimp_item_get_ID (GIMP_ITEM (object)),
+                              gimp_item_get_id (GIMP_ITEM (object)),
                               gimp_image_get_display_name (image));
       g_free (tmp);
     }
diff --git a/libgimp/gimp.c b/libgimp/gimp.c
index 5af29c2316..d7895a98cc 100644
--- a/libgimp/gimp.c
+++ b/libgimp/gimp.c
@@ -150,7 +150,7 @@ static gboolean            _export_xmp       = FALSE;
 static gboolean            _export_iptc      = FALSE;
 static GimpCheckSize       _check_size       = GIMP_CHECK_SIZE_MEDIUM_CHECKS;
 static GimpCheckType       _check_type       = GIMP_CHECK_TYPE_GRAY_CHECKS;
-static gint                _gdisp_ID         = -1;
+static gint                _gdisp_id         = -1;
 static gchar              *_wm_class         = NULL;
 static gchar              *_display_name     = NULL;
 static gint                _monitor_number   = 0;
@@ -842,7 +842,7 @@ gimp_check_type (void)
 GimpDisplay *
 gimp_default_display (void)
 {
-  return gimp_display_get_by_id (_gdisp_ID);
+  return gimp_display_get_by_id (_gdisp_id);
 }
 
 /**
@@ -1139,7 +1139,7 @@ _gimp_config (GPConfig *config)
   _export_exif      = config->export_exif      ? TRUE : FALSE;
   _export_xmp       = config->export_xmp       ? TRUE : FALSE;
   _export_iptc      = config->export_iptc      ? TRUE : FALSE;
-  _gdisp_ID         = config->gdisp_ID;
+  _gdisp_id         = config->gdisp_id;
   _wm_class         = g_strdup (config->wm_class);
   _display_name     = g_strdup (config->display_name);
   _monitor_number   = config->monitor_number;
@@ -1165,5 +1165,5 @@ _gimp_config (GPConfig *config)
   g_free (path);
   g_object_unref (file);
 
-  _gimp_shm_open (config->shm_ID);
+  _gimp_shm_open (config->shm_id);
 }
diff --git a/libgimp/gimptilebackendplugin.c b/libgimp/gimptilebackendplugin.c
index 955a0de7a6..fafa24dba2 100644
--- a/libgimp/gimptilebackendplugin.c
+++ b/libgimp/gimptilebackendplugin.c
@@ -333,7 +333,7 @@ gimp_tile_get (GimpTileBackendPlugin *backend_plugin,
   GPTileData                   *tile_data;
   GimpWireMessage               msg;
 
-  tile_req.drawable_ID = priv->drawable_id;
+  tile_req.drawable_id = priv->drawable_id;
   tile_req.tile_num    = tile->tile_num;
   tile_req.shadow      = priv->shadow;
 
@@ -355,7 +355,7 @@ gimp_tile_get (GimpTileBackendPlugin *backend_plugin,
     }
 
   tile_data = msg.data;
-  if (tile_data->drawable_ID != priv->drawable_id ||
+  if (tile_data->drawable_id != priv->drawable_id ||
       tile_data->tile_num    != tile->tile_num    ||
       tile_data->shadow      != priv->shadow      ||
       tile_data->width       != tile->ewidth      ||
@@ -365,7 +365,7 @@ gimp_tile_get (GimpTileBackendPlugin *backend_plugin,
 #if 0
       g_printerr ("tile_data: %d %d %d %d %d %d\n"
                   "tile:      %d %d %d %d %d %d\n",
-                  tile_data->drawable_ID,
+                  tile_data->drawable_id,
                   tile_data->tile_num,
                   tile_data->shadow,
                   tile_data->width,
@@ -419,7 +419,7 @@ gimp_tile_put (GimpTileBackendPlugin *backend_plugin,
   GPTileData                   *tile_info;
   GimpWireMessage               msg;
 
-  tile_req.drawable_ID = -1;
+  tile_req.drawable_id = -1;
   tile_req.tile_num    = 0;
   tile_req.shadow      = 0;
 
@@ -441,7 +441,7 @@ gimp_tile_put (GimpTileBackendPlugin *backend_plugin,
 
   tile_info = msg.data;
 
-  tile_data.drawable_ID = priv->drawable_id;
+  tile_data.drawable_id = priv->drawable_id;
   tile_data.tile_num    = tile->tile_num;
   tile_data.shadow      = priv->shadow;
   tile_data.bpp         = priv->bpp;
diff --git a/libgimpbase/gimpprotocol.c b/libgimpbase/gimpprotocol.c
index 01f8c3b180..b3c5175c07 100644
--- a/libgimpbase/gimpprotocol.c
+++ b/libgimpbase/gimpprotocol.c
@@ -485,7 +485,7 @@ _gp_config_read (GIOChannel      *channel,
                                &config->tile_height, 1, user_data))
     goto cleanup;
   if (! _gimp_wire_read_int32 (channel,
-                               (guint32 *) &config->shm_ID, 1, user_data))
+                               (guint32 *) &config->shm_id, 1, user_data))
     goto cleanup;
   if (! _gimp_wire_read_int8 (channel,
                               (guint8 *) &config->check_size, 1, user_data))
@@ -522,7 +522,7 @@ _gp_config_read (GIOChannel      *channel,
                               user_data))
     goto cleanup;
   if (! _gimp_wire_read_int32 (channel,
-                               (guint32 *) &config->gdisp_ID, 1, user_data))
+                               (guint32 *) &config->gdisp_id, 1, user_data))
     goto cleanup;
 
   if (! _gimp_wire_read_string (channel,
@@ -581,7 +581,7 @@ _gp_config_write (GIOChannel      *channel,
                                 &config->tile_height, 1, user_data))
     return;
   if (! _gimp_wire_write_int32 (channel,
-                                (const guint32 *) &config->shm_ID, 1,
+                                (const guint32 *) &config->shm_id, 1,
                                 user_data))
     return;
   if (! _gimp_wire_write_int8 (channel,
@@ -621,7 +621,7 @@ _gp_config_write (GIOChannel      *channel,
                                user_data))
     return;
   if (! _gimp_wire_write_int32 (channel,
-                                (const guint32 *) &config->gdisp_ID, 1,
+                                (const guint32 *) &config->gdisp_id, 1,
                                 user_data))
     return;
   if (! _gimp_wire_write_string (channel,
@@ -682,7 +682,7 @@ _gp_tile_req_read (GIOChannel      *channel,
   GPTileReq *tile_req = g_slice_new0 (GPTileReq);
 
   if (! _gimp_wire_read_int32 (channel,
-                               (guint32 *) &tile_req->drawable_ID, 1,
+                               (guint32 *) &tile_req->drawable_id, 1,
                                user_data))
     goto cleanup;
   if (! _gimp_wire_read_int32 (channel,
@@ -708,7 +708,7 @@ _gp_tile_req_write (GIOChannel      *channel,
   GPTileReq *tile_req = msg->data;
 
   if (! _gimp_wire_write_int32 (channel,
-                                (const guint32 *) &tile_req->drawable_ID, 1,
+                                (const guint32 *) &tile_req->drawable_id, 1,
                                 user_data))
     return;
   if (! _gimp_wire_write_int32 (channel,
@@ -759,7 +759,7 @@ _gp_tile_data_read (GIOChannel      *channel,
   GPTileData *tile_data = g_slice_new0 (GPTileData);
 
   if (! _gimp_wire_read_int32 (channel,
-                               (guint32 *) &tile_data->drawable_ID, 1,
+                               (guint32 *) &tile_data->drawable_id, 1,
                                user_data))
     goto cleanup;
   if (! _gimp_wire_read_int32 (channel,
@@ -810,7 +810,7 @@ _gp_tile_data_write (GIOChannel      *channel,
   GPTileData *tile_data = msg->data;
 
   if (! _gimp_wire_write_int32 (channel,
-                                (const guint32 *) &tile_data->drawable_ID, 1,
+                                (const guint32 *) &tile_data->drawable_id, 1,
                                 user_data))
     return;
   if (! _gimp_wire_write_int32 (channel,
diff --git a/libgimpbase/gimpprotocol.h b/libgimpbase/gimpprotocol.h
index a7051ea3ae..35a45da96e 100644
--- a/libgimpbase/gimpprotocol.h
+++ b/libgimpbase/gimpprotocol.h
@@ -100,7 +100,7 @@ struct _GPConfig
 {
   guint32  tile_width;
   guint32  tile_height;
-  gint32   shm_ID;
+  gint32   shm_id;
   gint8    check_size;
   gint8    check_type;
   gint8    show_help_button;
@@ -110,7 +110,7 @@ struct _GPConfig
   gint8    export_exif;
   gint8    export_xmp;
   gint8    export_iptc;
-  gint32   gdisp_ID;
+  gint32   gdisp_id;
   gchar   *app_name;
   gchar   *wm_class;
   gchar   *display_name;
@@ -124,14 +124,14 @@ struct _GPConfig
 
 struct _GPTileReq
 {
-  gint32   drawable_ID;
+  gint32   drawable_id;
   guint32  tile_num;
   guint32  shadow;
 };
 
 struct _GPTileData
 {
-  gint32   drawable_ID;
+  gint32   drawable_id;
   guint32  tile_num;
   guint32  shadow;
   guint32  bpp;
diff --git a/pdb/groups/fileops.pdb b/pdb/groups/fileops.pdb
index 9a6b53a701..987af02e13 100644
--- a/pdb/groups/fileops.pdb
+++ b/pdb/groups/fileops.pdb
@@ -237,7 +237,7 @@ HELP
           for (i = 0, list = layers;
                i < num_layers;
                i++, list = g_list_next (list))
-            layer_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+            layer_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
 
           g_list_free (layers);
         }
diff --git a/pdb/groups/image.pdb b/pdb/groups/image.pdb
index da70000175..098d2f6949 100644
--- a/pdb/groups/image.pdb
+++ b/pdb/groups/image.pdb
@@ -76,7 +76,7 @@ HELP
       image_ids = g_new (gint32, num_images);
 
       for (i = 0; i < num_images; i++, list = g_list_next (list))
-        image_ids[i] = gimp_image_get_ID (GIMP_IMAGE (list->data));
+        image_ids[i] = gimp_image_get_id (GIMP_IMAGE (list->data));
     }
 }
 CODE
@@ -275,7 +275,7 @@ HELP
       layer_ids = g_new (gint32, num_layers);
 
       for (i = 0; i < num_layers; i++, list = g_list_next (list))
-        layer_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+        layer_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
     }
 }
 CODE
@@ -321,7 +321,7 @@ HELP
       channel_ids = g_new (gint32, num_channels);
 
       for (i = 0; i < num_channels; i++, list = g_list_next (list))
-        channel_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+        channel_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
     }
 }
 CODE
@@ -364,7 +364,7 @@ HELP
       vector_ids = g_new (gint32, num_vectors);
 
       for (i = 0; i < num_vectors; i++, list = g_list_next (list))
-        vector_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+        vector_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
     }
 }
 CODE
diff --git a/pdb/groups/image_guides.pdb b/pdb/groups/image_guides.pdb
index d066e46fd9..ed7c7e7d64 100644
--- a/pdb/groups/image_guides.pdb
+++ b/pdb/groups/image_guides.pdb
@@ -47,7 +47,7 @@ HELP
       GimpGuide *g;
 
       g = gimp_image_add_hguide (image, yposition, TRUE);
-      guide = gimp_aux_item_get_ID (GIMP_AUX_ITEM (g));
+      guide = gimp_aux_item_get_id (GIMP_AUX_ITEM (g));
     }
   else
     success = FALSE;
@@ -87,7 +87,7 @@ HELP
       GimpGuide *g;
 
       g = gimp_image_add_vguide (image, xposition, TRUE);
-      guide = gimp_aux_item_get_ID (GIMP_AUX_ITEM (g));
+      guide = gimp_aux_item_get_id (GIMP_AUX_ITEM (g));
     }
   else
     success = FALSE;
@@ -157,13 +157,13 @@ HELP
   GimpGuide *g = gimp_image_get_next_guide (image, guide, &success);
 
   if (g)
-    next_guide = gimp_aux_item_get_ID (GIMP_AUX_ITEM (g));
+    next_guide = gimp_aux_item_get_id (GIMP_AUX_ITEM (g));
 
   if (! success)
     g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                  _("Image '%s' (%d) does not contain guide with ID %d"),
                  gimp_image_get_display_name (image),
-                 gimp_image_get_ID (image),
+                 gimp_image_get_id (image),
                  guide);
 }
 CODE
diff --git a/pdb/groups/image_sample_points.pdb b/pdb/groups/image_sample_points.pdb
index e116f7a902..8a051034d3 100644
--- a/pdb/groups/image_sample_points.pdb
+++ b/pdb/groups/image_sample_points.pdb
@@ -51,7 +51,7 @@ HELP
 
       sp = gimp_image_add_sample_point_at_pos (image, position_x, position_y,
                                                TRUE);
-      sample_point = gimp_aux_item_get_ID (GIMP_AUX_ITEM (sp));
+      sample_point = gimp_aux_item_get_id (GIMP_AUX_ITEM (sp));
     }
   else
     success = FALSE;
@@ -125,13 +125,13 @@ HELP
                                                           &success);
 
   if (sp)
-    next_sample_point = gimp_aux_item_get_ID (GIMP_AUX_ITEM (sp));
+    next_sample_point = gimp_aux_item_get_id (GIMP_AUX_ITEM (sp));
 
   if (! success)
     g_set_error (error, GIMP_PDB_ERROR, GIMP_PDB_ERROR_INVALID_ARGUMENT,
                  _("Image '%s' (%d) does not contain sample point with ID %d"),
                  gimp_image_get_display_name (image),
-                 gimp_image_get_ID (image),
+                 gimp_image_get_id (image),
                  sample_point);
 }
 CODE
diff --git a/pdb/groups/item.pdb b/pdb/groups/item.pdb
index a19aa0051c..3dcf66448a 100644
--- a/pdb/groups/item.pdb
+++ b/pdb/groups/item.pdb
@@ -409,7 +409,7 @@ HELP
                list;
                list = g_list_next (list), i++)
             {
-              child_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+              child_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
             }
         }
     }
diff --git a/pdb/groups/vectors.pdb b/pdb/groups/vectors.pdb
index 6244b1c529..0a33df82a7 100644
--- a/pdb/groups/vectors.pdb
+++ b/pdb/groups/vectors.pdb
@@ -159,7 +159,7 @@ HELP
            cur_stroke;
            cur_stroke = gimp_vectors_stroke_get_next (vectors, cur_stroke))
         {
-          stroke_ids[i] = gimp_stroke_get_ID (cur_stroke);
+          stroke_ids[i] = gimp_stroke_get_id (cur_stroke);
           i++;
         }
     }
@@ -772,7 +772,7 @@ HELP
          gimp_vectors_stroke_add (vectors, stroke);
          g_object_unref (stroke);
 
-         stroke_id = gimp_stroke_get_ID (stroke);
+         stroke_id = gimp_stroke_get_id (stroke);
 
          success = TRUE;
        }
@@ -830,7 +830,7 @@ HELP
       gimp_vectors_stroke_add (vectors, stroke);
       g_object_unref (stroke);
 
-      stroke_id = gimp_stroke_get_ID (stroke);
+      stroke_id = gimp_stroke_get_id (stroke);
     }
   else
     success = FALSE;
@@ -1065,7 +1065,7 @@ HELP
       gimp_vectors_stroke_add (vectors, stroke);
       g_object_unref (stroke);
 
-      stroke_id = gimp_stroke_get_ID (stroke);
+      stroke_id = gimp_stroke_get_id (stroke);
     }
   else
     success = FALSE;
@@ -1130,7 +1130,7 @@ HELP
       
          list = vectors_list;
           for (i = 0; i < num_vectors; i++, list = g_list_next (list))
-            vectors_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+            vectors_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
 
           g_list_free (vectors_list);
         }
@@ -1195,7 +1195,7 @@ HELP
       
          list = vectors_list;
           for (i = 0; i < num_vectors; i++, list = g_list_next (list))
-            vectors_ids[i] = gimp_item_get_ID (GIMP_ITEM (list->data));
+            vectors_ids[i] = gimp_item_get_id (GIMP_ITEM (list->data));
 
           g_list_free (vectors_list);
         }



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