[netmod] YANG 1.0 behavior for leafref

[Andy Bierman <[e-mail]>]

Hi,

The leafref text was changed to allow the require-instance-stmt in YANG 1.1

RFC 6020, sec. 9.9. is quite clear that this sub-statement is not allowed.

9.9.1.  Restrictions

   A leafref cannot be restricted.

9.13.1.  Restrictions

   An instance-identifier can be restricted with the "require-instance"
   statement (Section 9.13.2).


However, the ABNF on page 149 clearly contradicts the text in 9.9.1:

  leafref-specification =
                         ;; these stmts can appear in any order
                         path-stmt stmtsep
                         [require-instance-stmt stmtsep]

   path-stmt           = path-keyword sep path-arg-str stmtend

   require-instance-stmt = require-instance-keyword sep
                            require-instance-arg-str stmtend



So which normative text is correct?
Is instance-required-stmt allowing in YANG 1.0?


Andy