Is there a schema for Ogre mesh.xml or *.scene

I’m looking to create a street or city builder for JME3. I figure the best way to do this is build my own series of .mesh.xml files then put them in a myCity.scene file, both of which are xml files.

I know that you read your Mesh files with the com.jme3.scene.plugins.ogre.MeshLoader using SAX but why not use a DOM api using a DocumentBuilder. That way you could validate it against a schema with the values you place into the XML elements and attributes.

Again, anybody have a schema for Ogre mesh.xml or the the similar *.scene file?