[netmod] Design-Time schema mount

[Balazs Lengyel]

Hello, As I understand it, Schema-mount today does not support an important use-case which we definitely need, but others also indicated they want. I want to specify off-line in design time which models will be mounted where. Many of my nodes know in design-time what their model structure will be, so I want a way to be able to document this in YANG. In today's proposal the only way to find the Yang-Mounts is to read it from the live node. OAM integrators or operators want to be able to write CLI scripts and Netconf messages without accessing (expensive) real nodes. For this they need to know the mounts We want to generate some fancy documentation from YANG automatically in design-time. Many use cases need the possibility to mount schemas, but do not need the added complexity of schema changes in run-time. Notwithstanding the case of "YANG Features", for me the model schema is a mostly static description of a nodes capabilities. Most of the time I do not want to worry about the node changing its schema on the fly. For this I propose 2 YANG extensions extension schema-mount {     description "Indicates that a YANG Module is to be mounted into another module.         The argument specifies the name of the module to be mounted.";     argument mounted-module; } extension schema-mount-target {     description "Specifies the target node under which a YANG module is to be mounted.         The statement can only be used inside a schema-mount statement.         The argument follows the same rules as an augment statement's target.     argument target-node; } The two extension statements can be placed in a separate module or the mounted module.         I don't insist on the solution, but I need the off-line/design-time specification of yang-mount to be possible. IMHO the design-time mount use-case is more important than the dynamic-mount. regards Balazs -- Balazs Lengyel Ericsson Hungary Ltd. Senior Specialist Mobile: +36-70-330-7909 email: balazs.leng...@ericsson.com

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