How to set categories for Enterprises via?

Hi all,
a little question about Enterprise structure...

When in edit mode on Company data using OGo web gui, there is
a "Categories" section we can use to assign categories to enterprises,
but i cannot found corresponding data fields into Enterprise Document
record structure...

Here i refer to the documentation snippet at

http://www.opengroupware.org/en/devs/docs/snippets/xmlrpc/EnterpriseStruct.html


Is there a way to operate on Enterprise categories using XML-RPC?
If so, how?
(I'm using ogo-jogi API library)

Thanks in advance
Best Regards
Roberto


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