What file type should I use to import a mesh and its armature + animations?

I want to import like oto is imported, from the test files. It is a .mesh.xml file. I have no idea how to export that.
I do have the ogre 3D exporter.
What should I select (mesh + armature) and what should I check/uncheck when exporting?

Double post: http://hub.jmonkeyengine.org/forum/topic/how-to-export-mesh-xml/