[Nsi-wg] CS 2.1 cannot send only the parameters to be modifed

[Hans Trompert]

Dear NSI WG members,

The CS 2.1 document states in section 15.7 that only the elements to be
modified are included in a modify request. However, in the schema the
p2p parameters directionality,  capacity, sourceSTP and destSTP are not
optional. As a result the example modify requests in figure 154 and 155
will not pass schema validation.

If the four parameters are made optional in the schema it will also be
possible to leave them out in the initial reserve request, which will
cause problems because all four of them belong to the minimum set of
parameters in this stage. Or the schema is left as is making it
mandatory to always send the minimum set of parameters in every modify
request, in this case section 15.7 should be updated to reflect this.

Please advise how to proceed.

Cheers,
    HansT.
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