ISO-MME

Should the descriptor Reference system id in channel files be mandatory or optional

In proposal 8 the descriptor .Reference system id is optional (see RED A 1.3.4.1)

Problems:

• 1) If the descriptor is mandatory it is redundant information. It is equivalent to a part of the Codeextension if the extension may not be ommitted (see open issue http://www.iso-mme.org/forum/viewtopic.php?f=35&t=152)

• 2) If the descriptor is optional it has to start with a "."
  (see open issue http://www.iso-mme.org/forum/viewtopic.php?f=35&t=150 )

• 3) If the descriptor is unnecessary the Codeextension don't have to be omitted.

Solutions:

• A) The descriptor is mandatory.

• B) The descriptor is optional.

• C) The descriptor is unnecessary.

• D) I describe another solution.

My preference:
I prefer solution C.
D: A second solution would be B in conjunction with open issue
http://www.iso-mme.org/forum/viewtopic.php?f=35&t=150 solution C (-> optional, but without a dot)

Open Issue – reference system id

Note – LOC needs to be removed from table 2.3 in RED-A!

We decided to adopt solution C) [The descriptor is unnecessary.]