context FEATURE public API for parsing schemas
diff --git a/models/ietf-yang-metadata@2016-08-05.yang b/models/ietf-yang-metadata@2016-08-05.yang
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+module ietf-yang-metadata {
+ namespace "urn:ietf:params:xml:ns:yang:ietf-yang-metadata";
+ prefix md;
+
+ organization
+ "IETF NETMOD (NETCONF Data Modeling Language) Working Group";
+ contact
+ "WG Web: <https://datatracker.ietf.org/wg/netmod/>
+
+ WG List: <mailto:netmod@ietf.org>
+
+ WG Chair: Lou Berger
+ <mailto:lberger@labn.net>
+
+ WG Chair: Kent Watsen
+ <mailto:kwatsen@juniper.net>
+
+ Editor: Ladislav Lhotka
+ <mailto:lhotka@nic.cz>";
+ description
+ "This YANG module defines an 'extension' statement that allows
+ for defining metadata annotations.
+
+ Copyright (c) 2016 IETF Trust and the persons identified as
+ authors of the code. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or
+ without modification, is permitted pursuant to, and subject to
+ the license terms contained in, the Simplified BSD License set
+ forth in Section 4.c of the IETF Trust's Legal Provisions
+ Relating to IETF Documents
+ (http://trustee.ietf.org/license-info).
+
+ This version of this YANG module is part of RFC 7952
+ (http://www.rfc-editor.org/info/rfc7952); see the RFC itself
+ for full legal notices.";
+
+ revision 2016-08-05 {
+ description
+ "Initial revision.";
+ reference
+ "RFC 7952: Defining and Using Metadata with YANG";
+ }
+
+ extension annotation {
+ argument name;
+ description
+ "This extension allows for defining metadata annotations in
+ YANG modules. The 'md:annotation' statement can appear only
+ at the top level of a YANG module or submodule, i.e., it
+ becomes a new alternative in the ABNF production rule for
+ 'body-stmts' (Section 14 in RFC 7950).
+
+ The argument of the 'md:annotation' statement defines the name
+ of the annotation. Syntactically, it is a YANG identifier as
+ defined in Section 6.2 of RFC 7950.
+
+ An annotation defined with this 'extension' statement inherits
+ the namespace and other context from the YANG module in which
+ it is defined.
+
+ The data type of the annotation value is specified in the same
+ way as for a leaf data node using the 'type' statement.
+
+ The semantics of the annotation and other documentation can be
+ specified using the following standard YANG substatements (all
+ are optional): 'description', 'if-feature', 'reference',
+ 'status', and 'units'.
+
+ A server announces support for a particular annotation by
+ including the module in which the annotation is defined among
+ the advertised YANG modules, e.g., in a NETCONF <hello>
+ message or in the YANG library (RFC 7950). The annotation can
+ then be attached to any instance of a data node defined in any
+ YANG module that is advertised by the server.
+
+ XML encoding and JSON encoding of annotations are defined in
+ RFC 7952.";
+ }
+}