Add alt text for badges

The RST image directive takes an alt parameter that's used to supply an
alt attribute for the HTML image element that's generated during RST
to HTML conversion.  The alt text is useful for accessibility purposes
and is also displayed if the image source is unavailable when the HTML
is generated.  Because of the latter point, we can't rely on the
accessibility features of the SVG image, we need to maintain some info
here in the README.rst file.

Change-Id: Ibd1ab0189aed56da9b95be28615d070750dcf76d

1 files changed, 10 insertions, 0 deletions

diff --git a/README.rst b/README.rst
index 70edd07..6fdf37f 100644
--- a/README.rst
+++ b/README.rst
@@ -4,6 +4,16 @@ Team and repository tags
 
 .. image:: http://governance.openstack.org/badges/glance_store.svg
     :target: http://governance.openstack.org/reference/tags/index.html
+    :alt: The following tags have been asserted for the Glance Store
+          Library:
+          "project:official",
+          "stable:follows-policy",
+          "vulnerability:managed",
+          "team:diverse-affiliation".
+          Follow the link for an explanation of these tags.
+.. NOTE(rosmaita): the alt text above will have to be updated when
+   additional tags are asserted for glance_store.  (The SVG in the
+   governance repo is updated automatically.)
 
 .. Change things from this point on