[gnome-software.wiki] Update software metadata

[Philip Withnall <pwithnall src gnome org>]

commit d2a8af2ce2d5a659d662bc73006293002bb4acfc
Author: Philip Withnall <philip tecnocode co uk>
Date:   Wed Aug 18 11:58:39 2021 +0000

    Update software metadata

 software-metadata.md | 32 ++++++++++++++++++++++++++++----
 1 file changed, 28 insertions(+), 4 deletions(-)
---
diff --git a/software-metadata.md b/software-metadata.md
index 712c159..b69eccd 100644
--- a/software-metadata.md
+++ b/software-metadata.md
@@ -1,15 +1,39 @@
-Software metadata
+How GNOME Software uses metadata
 ===
 
-Where metadata comes from
+Storage <a name="storage"></a>
+---
+<!-- gnome-software links to #storage so that must always exist as an anchor -->
+
+TODO
+
+Hardware support <a name="hardware-support"></a>
+---
+<!-- gnome-software links to #hardware-support so that must always exist as an anchor -->
+
+TODO
+
+Age rating <a name="age-rating"></a>
+---
+<!-- gnome-software links to #age-rating so that must always exist as an anchor -->
+
+TODO
+
+Safety <a name="safety"></a>
 ---
+<!-- gnome-software links to #safety so that must always exist as an anchor -->
+
+TODO
 
-The metadata used to specify what hardware a piece of software requires, what ages of user it is suitable 
for, and factors which contribute to how safe it might be to install, all come from the metainfo file for 
that application.
+Where metadata comes from
+===
+
+The metadata used to specify what hardware a piece of software requires, what ages of user it is suitable 
for, and factors which contribute to how safe it might be to install, all come from the metainfo file for 
that software.
 
 The metainfo file format is specified in the [AppStream 
specification](https://www.freedesktop.org/software/appstream/docs/).
 
 What happens if metadata is missing
----
+===
 
 If some metadata is missing for an application, GNOME Software can only guess what it might be, and hence 
can’t present much information in its interfaces. The guesses GNOME Software makes are based on the fact that 
most software is designed for desktop computers.