--- /dev/null
+module ietf-yang-schema-mount {
+ yang-version 1.1;
+ namespace "urn:ietf:params:xml:ns:yang:ietf-yang-schema-mount";
+ prefix yangmnt;
+
+ import ietf-inet-types {
+ prefix inet;
+ reference
+ "RFC 6991: Common YANG Data Types";
+ }
+
+ import ietf-yang-types {
+ prefix yang;
+ reference
+ "RFC 6991: Common YANG Data Types";
+ }
+
+ organization
+ "IETF NETMOD (NETCONF Data Modeling Language) Working Group";
+
+ contact
+ "WG Web: <https://datatracker.ietf.org/wg/netmod/>
+ WG List: <mailto:netmod@ietf.org>
+
+ Editor: Martin Bjorklund
+ <mailto:mbj@tail-f.com>
+
+ Editor: Ladislav Lhotka
+ <mailto:lhotka@nic.cz>";
+
+ description
+ "This module defines a YANG extension statement that can be used
+ to incorporate data models defined in other YANG modules in a
+ module. It also defines operational state data that specify the
+ overall structure of the data model.
+
+ The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
+ NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
+ 'MAY', and 'OPTIONAL' in this document are to be interpreted as
+ described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
+ they appear in all capitals, as shown here.
+
+ Copyright (c) 2019 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
+ (https://trustee.ietf.org/license-info).
+
+ This version of this YANG module is part of RFC 8528;
+ see the RFC itself for full legal notices.";
+
+ revision 2019-01-14 {
+ description
+ "Initial revision.";
+ reference
+ "RFC 8528: YANG Schema Mount";
+ }
+
+ /*
+ * Extensions
+ */
+
+ extension mount-point {
+ argument label;
+ description
+ "The argument 'label' is a YANG identifier, i.e., it is of the
+ type 'yang:yang-identifier'.
+
+ The 'mount-point' statement MUST NOT be used in a YANG
+ version 1 module, neither explicitly nor via a 'uses'
+ statement.
+ The 'mount-point' statement MAY be present as a substatement
+ of 'container' and 'list' and MUST NOT be present elsewhere.
+ There MUST NOT be more than one 'mount-point' statement in a
+ given 'container' or 'list' statement.
+
+ If a mount point is defined within a grouping, its label is
+ bound to the module where the grouping is used.
+
+ A mount point defines a place in the node hierarchy where
+ other data models may be attached. A server that implements a
+ module with a mount point populates the
+ '/schema-mounts/mount-point' list with detailed information on
+ which data models are mounted at each mount point.
+
+ Note that the 'mount-point' statement does not define a new
+ data node.";
+ }
+
+ /*
+ * State data nodes
+ */
+
+ container schema-mounts {
+ config false;
+ description
+ "Contains information about the structure of the overall
+ mounted data model implemented in the server.";
+ list namespace {
+ key "prefix";
+ description
+ "This list provides a mapping of namespace prefixes that are
+ used in XPath expressions of 'parent-reference' leafs to the
+ corresponding namespace URI references.";
+ leaf prefix {
+ type yang:yang-identifier;
+ description
+ "Namespace prefix.";
+ }
+ leaf uri {
+ type inet:uri;
+ description
+ "Namespace URI reference.";
+ }
+ }
+ list mount-point {
+ key "module label";
+
+ description
+ "Each entry of this list specifies a schema for a particular
+ mount point.
+
+ Each mount point MUST be defined using the 'mount-point'
+ extension in one of the modules listed in the server's
+ YANG library instance with conformance type 'implement'.";
+ leaf module {
+ type yang:yang-identifier;
+ description
+ "Name of a module containing the mount point.";
+ }
+ leaf label {
+ type yang:yang-identifier;
+ description
+ "Label of the mount point defined using the 'mount-point'
+ extension.";
+ }
+ leaf config {
+ type boolean;
+ default "true";
+ description
+ "If this leaf is set to 'false', then all data nodes in the
+ mounted schema are read-only ('config false'), regardless
+ of their 'config' property.";
+ }
+ choice schema-ref {
+ mandatory true;
+ description
+ "Alternatives for specifying the schema.";
+ container inline {
+ presence
+ "A complete self-contained schema is mounted at the
+ mount point.";
+ description
+ "This node indicates that the server has mounted at least
+ the module 'ietf-yang-library' at the mount point, and
+ its instantiation provides the information about the
+ mounted schema.
+
+ Different instances of the mount point may have
+ different schemas mounted.";
+ }
+ container shared-schema {
+ presence
+ "The mounted schema together with the 'parent-reference'
+ make up the schema for this mount point.";
+
+ description
+ "This node indicates that the server has mounted at least
+ the module 'ietf-yang-library' at the mount point, and
+ its instantiation provides the information about the
+ mounted schema. When XPath expressions in the mounted
+ schema are evaluated, the 'parent-reference' leaf-list
+ is taken into account.
+
+ Different instances of the mount point MUST have the
+ same schema mounted.";
+ leaf-list parent-reference {
+ type yang:xpath1.0;
+ description
+ "Entries of this leaf-list are XPath 1.0 expressions
+ that are evaluated in the following context:
+
+ - The context node is the node in the parent data tree
+ where the mount-point is defined.
+
+ - The accessible tree is the parent data tree
+ *without* any nodes defined in modules that are
+ mounted inside the parent schema.
+
+ - The context position and context size are both equal
+ to 1.
+
+ - The set of variable bindings is empty.
+
+ - The function library is the core function library
+ defined in the W3C XPath 1.0 document
+ (http://www.w3.org/TR/1999/REC-xpath-19991116) and
+ the functions defined in Section 10 of RFC 7950.
+
+ - The set of namespace declarations is defined by the
+ 'namespace' list under 'schema-mounts'.
+
+ Each XPath expression MUST evaluate to a node-set
+ (possibly empty). For the purposes of evaluating
+ XPath expressions whose context nodes are defined in
+ the mounted schema, the union of all these node-sets
+ together with ancestor nodes are added to the
+ accessible data tree.
+
+ Note that in the case 'ietf-yang-schema-mount' is
+ itself mounted, a 'parent-reference' in the mounted
+ module may refer to nodes that were brought into the
+ accessible tree through a 'parent-reference' in the
+ parent schema.";
+ }
+ }
+ }
+ }
+ }
+}
Code Review / sim / o1-interface.git / blobdiff