[grilo-plugins] tracker: Update query() documentation

[Juan A. Suarez Romero <jasuarez src gnome org>]

commit bb8a952883a8ac0d31a59c6fc043e19abb6644a6
Author: Juan A. Suarez Romero <jasuarez igalia com>
Date:   Wed Jan 19 17:28:34 2011 +0100

    tracker: Update query() documentation
    
    Grilo media type (rdf:type() or "grl#Box") must be the first column in
    the query, and it doesn't need to be named.
    
    Signed-off-by: Juan A. Suarez Romero <jasuarez igalia com>

 src/tracker/grl-tracker.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/tracker/grl-tracker.c b/src/tracker/grl-tracker.c
index 73317d3..5d81bef 100644
--- a/src/tracker/grl-tracker.c
+++ b/src/tracker/grl-tracker.c
@@ -743,9 +743,9 @@ grl_tracker_source_supported_keys (GrlMetadataSource *source)
  * Columns must be named with the Grilo key name that the column
  * represent. Unnamed or unknown columns will be ignored.
  *
- * For the case of media type, name to be used is "grilo-media-type". This is a
- * mandatory column. It must match with rdf:type() property. Types understood
- * are:
+ * First column must be the media type, and it does not need to be named.  It
+ * must match with any value supported in rdf:type() property, or
+ * grilo#Box. Types understood are:
  *
  * <itemizedlist>
  *   <listitem>
@@ -784,7 +784,7 @@ grl_tracker_source_supported_keys (GrlMetadataSource *source)
  *
  * <informalexample>
  *   <programlisting>
- *     SELECT rdf:type(?song)  AS grilo-media-type
+ *     SELECT rdf:type(?song)
  *            ?song            AS id
  *            nie:title(?song) AS title
  *            nie:url(?song)   AS url