Yes, OCCI allows you to get Metadata for almost every object in the database (provided you have the rights on these objects), including procedures. So you can get the parameters from a procedure as well as their type, and then metadata related to this type if it is an Object or Collection Type.

I haven't used this personally but the colleague I spoke of used it and it proved to be very useful to us.

HTH & Regards,

rbaraer