>> Gotcha. What do other people think, would a "uses-yang-data"
>> statement be generally more useful?
>
> But does this mean we also do uses-yang-container, uses-yang-list,
> uses-yang-xyz to other definitions as well? I do not think this is
> desirable and why would yang-data be any different?
Oh, no. I view yang-data as a body-stmt, not a data-def-stmt,
akin to 'rpc' and 'notification'. But back to the draft's
proposed solution, I understand that augment-stmt is a top-level
body-stmt, but it's also a uses-stmt, and in that context, it is
a sibling to the refine-stmt. Already ANIMA has a need to both
augment and refine a yang-data defined structure. To me, a
'uses-yang-data' statement seems just one step more general than
a 'augment-yang-data' statement.
Specially, if we were updating YANG:
// just added last entry
body-stmts = *(extension-stmt /
feature-stmt /
identity-stmt /
typedef-stmt /
grouping-stmt /
data-def-stmt /
augment-stmt /
rpc-stmt /
notification-stmt /
deviation-stmt /
yang-data-stmt)
// something like this?
yang-data-stmt = yang-data-keyword sep identifier-arg-str optsep
(";" /
"{" stmtsep
;; these stmts can appear in any order
[status-stmt]
[description-stmt]
[reference-stmt]
*(typedef-stmt / yang-data-grouping-stmt)
*data-def-stmt
[uses-yang-data-stmt]
"}") stmtsep
// like 'uses-stmt', but with a different keyword
uses-yang-data-stmt = uses-yang-data-keyword sep
identifier-ref-arg-str optsep
(";" /
"{" stmtsep
;; these stmts can appear in any order
[when-stmt]
*if-feature-stmt
[status-stmt]
[description-stmt]
[reference-stmt]
*refine-stmt
*uses-augment-stmt
"}") stmtsep
// like 'grouping-stmt', but with 'action' and 'notification' removed
yang-data-grouping-stmt = yang-data-grouping-keyword sep
identifier-arg-str optsep
(";" /
"{" stmtsep
;; these stmts can appear in any order
[status-stmt]
[description-stmt]
[reference-stmt]
*(typedef-stmt / yang-data-grouping-stmt)
*data-def-stmt
"}") stmtsep
yang-data-keyword = %s"yang-data"
uses-yang-data-keyword = %s"uses-yang-data"
yang-data-grouping-keyword = %s"yang-data-grouping"
How close to this can we get using an extension statement, so that a
future adoption to YANG will be as seamless as possible?
K.
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