First, what’s a grove? Some definitions:
A set of interconnected nodes conforming to ISO/IEC 10744:1997 Annex A.4.
Ready-to-run objects. The application-internal information that is being created, edited, or used by an application.
The form of information that is the result of parsing an interchange document (written in XML, for example).
Information that is present in an interchange document, but which, for application programming, is structured differently in the grove. The abstract API to the information set.