Simon Fell > Its just code > OML

OPML has issues (the worst of which go away if the various applications that extend it go to the trouble to document the new attributes they've added), but I don't get it, I'm not seeing why OML is any better. How are naming clashes for the type attribute handled ?, how do I say what type of data is in the data element ? how are naming clashes in the metadata and item elements handled. What are the standard types ? XML has a standard extensibility mechanism, why isn't it used ? In fact I'm borderline on why a hierarchical data structure (an outline) needs a spec to describe how to store it in a hierarchical structure, isn't XML by definition an outline to start with ?