[xwiki-users] Question about Xwiki Import/Export XAR

Hello everyone, I am writing a script to translate XML exports of Mediawiki pages into the XAR format that XWiki can import. My challenge is that I have not found a formal definition of what the page's xml as well as the package xml should be, as they do not contain schema information. I have been "reverse engineering" the definition by looking at some exports, but if anyone is aware of where the definition could be found it would be extremely helpful. Thanks!