DDS — DDS ISSUE# 49] Behavior_of_register_type

Ref-161 Behavior_of_register_type

The specification does not say what happens if the application locally
tries to define the same "type_name" via register_type

The case where a different DataType is being "registered" with a name
that was already used should clearly fail

The case where the same DataType is registered again with the same
name could either fail or be idempotent.

**PROPOSAL**

State in 2.1.2.3.6 that it is a pre-condition that the same name has
not already been used to register a different type. In case this is
attempted the register_type() operation shall return
PRECONDITION_ERROR

State in 2.1.2.3.6 the documentation that it is OK to re-register the
same DataType again with the same type_name. In this case the
operation is idempotent and returns OK.

see below