B Implementation-Defined Items

The following items in this specification are implementation-defined:

  1. The revalidation modes that are supported by this implementation.

  2. The default revalidation mode for this implementation.

  3. The mechanism (if any) by which an external function can return an XDM instance and/or a pending update list to the invoking query.

  4. The semantics of fn:put(), including the kinds of nodes accepted as operands by this function.