Hello, Restconf (rfc8040) defined to useful bits of metadata about a YANG defined datastore: entity-tag and the last-modified timestamp.
These can be very useful in instance data sets, however Restconf defines an encoding for these (as part of the http headers) that can not be used in instance-data-sets. draft-ietf-netmod-yang-instance-file-format-03#section-7.2 <https://tools.ietf.org/html/draft-ietf-netmod-yang-instance-file-format-03# section-7.2> defines metadata annotations for these two, that can be used in instance data md:annotation entity-tag { type string; description "Used to encode the entity-tag "; } md:annotation last-modified { type yang:date-and-time; description "Contains the date and time when the annotated instance was last modified (or created)."; } In order to be able to include this data, the annotations need to be defined in some YANG module. The question has been raised whether 1. these annotations should be defined in the ietf-yang-instance-data module as it needs them, as that is open or 2. the annotations should be defined in another draft in a separate YANG module as any other annotation The first option is better because the instance-data needs these annotations, and at this point we see no other user for the annotation, and in this case the ongoing instance data draft will define it The second option is better because, if later there are other users for these annotations, it might be strange to reference the ietf-yang-instance-data module. Also why provide special treatment to these 2 annotations? The authors support option 1 and dont have the time to start a new draft to define these annotations. On IETF105 in the room there was more support for option 1. Please indicate if you have an opinion about the choice of 1 or 2 Regards Balazs
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