Add DTD for menudata.xml

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@40380 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/xml/menudata.dtd

@@ -0,0 +1,12 @@
+<!ELEMENT menudata (menubar*)>
+<!ELEMENT menubar (menu*)>
+<!ELEMENT menu (label, items)>
+<!ELEMENT items ((separator | menuitem | menu)*)>
+<!ELEMENT menuitem (label, help, keywords?, handler, command?, shortcut?)>
+<!ELEMENT separator EMPTY>
+<!ELEMENT label (#PCDATA)>
+<!ELEMENT help (#PCDATA)>
+<!ELEMENT handler (#PCDATA)>
+<!ELEMENT command (#PCDATA)>
+<!ELEMENT keywords (#PCDATA)>
+<!ELEMENT shortcut (#PCDATA)>