There is something called Virtualfem at Virtualfem.com. They
claim that theirs has something like 140,000 categories in AIML and
that you can load any AIML files into it's directory and it will
assimilate the data.
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AIML actually is XML. XML is a meta-language, used to create new languages. AIML is a language created using the XML standard built specifically to aid in the create of AI.