Where are the schemas (DTD or XML schema) for the XML files used on Android like AndroidManifest.xml or the layouts?
Where are the schemas for XML files on an Android project?
The XML schema doesn't seem to be documented, but there is a useful list of all the layout objects and their permitted attributes here:
Generally, defining a namespace in XML doesn't has to be a real existing URL but just a world wide unique String (therefore one prefers using their own URLs). Of course, it's nice if this URL contains the XML-schema (or worse, DTD). It would be also very nice if someone would create Android Ressource Schemata. I could help him as a bachelor thesis in CS. - Prof. Solymosi, Berlin