DDSXTY12 — Section 7.4.1.2.2 "Member ID-to-Parameter ID Mapping" is underspecified

Found by: Fernando Crespo, RTI (fernando@rti.com)
Severity: Support Text

Problem:
The mapping of type member IDs to DDS-RTPS parameter IDs described in section 7.4.1.2.2, "Member ID-to-Parameter ID Mapping", will never result in FLAG_IMPL_EXTENSION being set. However, this is not stated explicitly.

Proposed Resolution:
Explicitly state that RTPS parameters corresponding to members of user-defined data types should never set FLAG_IMPL_EXTENSION.

RTPS parameters corresponding to members of RTPS discovery-defined data types may or may not have FLAG_IMPL_EXTENSION set as defined by RTPS itself; the contract is unchanged. The mechanism by which an implementation generates that flag's value is unspecified.

Explicitly State when FLAG_IMPL_EXTENSION cannot be used

Problem description in DDSXTY12-40. There is no text explicitly stating that FLAG_IMPL_EXTENSION will never be set on user-defined data types. This clarifying text should be added to section 7.4.1.2.2