Mick said the document looks OK. He also said that his Python code uses the comtypes library which doesn't throw exceptions for S_FALSE like is the case for E_* error codes so he has to rely on the 0s and NULLs in the [out] parameters.
BTW, the only exception to the use of 0/NULL is IA2::indexInParent which returns -1 if there is no parent since 0 is a valid return value.
AccProbe status from Mike
0.3 will be released this week on eclipse.org with caret tracking, some bug fixes, and validation against the IBM internal inspect program.
Methods returning relations
Mike reminded us of the earlier request that a method is needed that takes a relation type as input and returns only those relations. I entered this as bug 124.