Interestingly, since it is actually XML, you could take advantage of all the XML features. A XSD may be able to encode the language grammar, and with XSLT, get

Interestingly, since it is actually XML, you could take advantage of all the XML features. A XSD may be able to encode the language grammar, and with XSLT, get some nice rendering. Of course, the parser is just a DOM parser, which is built in browsers and that's what the interpreter is using. But if you want to write a standalone compiler for it, just take an off the shelf XML DOM parser and you have your AST.