From: Alexandre Detiste <tchet@debian.org>
Subject: appdata in legacy format and location

--- a/setup.py
+++ b/setup.py
@@ -96,7 +96,7 @@
     scripts=["bin/photocollage"],
     data_files=[
         ("share/applications", ["data/photocollage.desktop"]),
-        ("share/appdata", ["data/photocollage.appdata.xml"]),
+        ("share/metainfo", ["data/photocollage.appdata.xml"]),
         ("share/icons/hicolor/scalable/apps",
          ["data/icons/hicolor/scalable/apps/photocollage.svg"]),
         ("share/icons/hicolor/16x16/apps",
--- a/data/photocollage.appdata.xml
+++ b/data/photocollage.appdata.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<application>
+<component type="desktop">
  <id type="desktop">photocollage.desktop</id>
  <metadata_license>CC-BY-3.0</metadata_license>
  <project_license>GPL-2.0+</project_license>
@@ -144,4 +144,4 @@
  </screenshots>
  <url type="homepage">https://github.com/adrienverge/PhotoCollage</url>
  <updatecontact>adrienverge_at_gmail.com</updatecontact>
-</application>
+</component>
