Switch package.xml to old schema for backwards compatibility

Author: chennes

package.xml

@@ -1,67 +1,27 @@
-<?xml
-    version = '1.0'
-    encoding = 'UTF-8'
-    standalone = 'no'
-?>
-<package
-    Manifest:schemaLocation = 'HTTPS://Addons.FreeCAD.Org/Manifest https://github.com/FreeCAD/FreeCAD-Addon-Manifest-Schema/releases/download/v1.6/Schema.xsd'
-    xmlns:Manifest = 'http://www.w3.org/2001/XMLSchema-instance'
-    xmlns = 'HTTPS://Addons.FreeCAD.Org/Manifest'
-
-    format = '1'
->
-
-    <version>1.0</version>
-
-    <!-- [ General ] - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
-
+<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
+<!-- NOTE: The Addon Manager still uses the original xmlns entry so that older versions of FreeCAD can upgrade
+ to the newest Addon Manager. This can be changed when FreeCAD v1.0 is no longer supported. -->
+<package format="1" xmlns="https://wiki.freecad.org/Package_Metadata">
+    <name>AddonManager</name>
     <description>Tool to install workbenches, macros, themes, etc.</description>
     <icon>resources/icons/preferences-addon_manager.svg</icon>
-    <name>AddonManager</name>
-
-    <!-- [ People ]  - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
-
-    <maintainer
-        email = 'chennes@freecad.org'
-    >Chris Hennes</maintainer>
-
-    <author
-        email = 'yorik@uncreated.net'
-    >Yorik van Havre</author>
-
+    <version>1.1.0dev</version>
+    <date>2025-05-22</date>
+    <maintainer email='chennes@freecad.org'>Chris Hennes</maintainer>
+    <author email = 'yorik@uncreated.net'>Yorik van Havre</author>
     <author>Jonathan Wiedemann</author>
-
     <author>Kurt Kremitzki</author>
-
-    <!-- [ Licences ]  - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
-
-    <license
-        file = 'LICENSE.md'
-    >LGPL-2.1</license>
-
-    <!-- [ Links ] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
-
-    <url
-        type = 'bugtracker'
-    >https://github.com/FreeCAD/AddonManager/issues</url>
-
-    <url
-        branch = 'main'
-        type = 'repository'
-    >https://github.com/FreeCAD/AddonManager</url>
-
-    <url
-        type = 'readme'
-    >https://github.com/FreeCAD/AddonManager/blob/main/README.md</url>
-
-    <!-- [ Content ] - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
+    <license file="LICENSE">LGPL-2.1-or-later</license>
+    <url type='repository' branch='main'>https://github.com/FreeCAD/AddonManager</url>
+    <url type='bugtracker'>https://github.com/FreeCAD/AddonManager/issues</url>
+    <url type='readme'>https://github.com/FreeCAD/AddonManager/blob/main/README.md</url>
 
     <content>
-        <other>
-
+        <workbench>
+            <!-- Even though the Addon Manager is not a workbench, it declares itself as one so that versions of
+            FreeCAD prior to 1.1 can see the InitGui.py file and run it. -->
             <name>AddonManager</name>
-
-        </other>
+            <subdirectory>./</subdirectory>
+        </workbench>
     </content>
-
 </package>