Collaboration messaging framework XML customization

Summary:

Collaboration messaging framework (CMF) XML customization. Oracle allows to add extra fields to the XML. But want to know are there any limitations/Restrictions on the number of fields (From other modules)/Attributes (Within AR) that can be added to the CMF XML.

Fields mean- Information from other modules.

Attributes means- Only AR attributes can be added to XML.

Question-1 - We can add only Attributes (With in AR) to the XML. We cannot add other module fields.

Question-2- We can add only 15 attributes to XML (with in AR). we can add only 20 fields to XML (from other modules).