data tree FEATURE support for lists with duplicate instances
Changes mainly in diff processing.
Refs #1483
diff --git a/models/yang@2021-04-07.yang b/models/yang@2021-04-07.yang
new file mode 100644
index 0000000..fafa4f2
--- /dev/null
+++ b/models/yang@2021-04-07.yang
@@ -0,0 +1,175 @@
+module yang {
+ namespace "urn:ietf:params:xml:ns:yang:1";
+ prefix yang;
+
+ import ietf-yang-metadata {
+ prefix md;
+ revision-date 2016-08-05;
+ }
+
+ organization
+ "libyang";
+
+ contact
+ "Web: <https://github.com/CESNET/libyang/>
+ Author: Radek Krejci <rkrejci@cesnet.cz>";
+
+ description
+ "This is a kind of fake model with no data, typedefs or anything
+ else. libyang uses this module to implement various YANG attributes
+ defined in RFC 6020.";
+
+ revision 2021-04-07 {
+ description
+ "Added metadata for key-less list and state leaf-list diff.";
+ }
+
+ revision 2020-06-17 {
+ description
+ "Added metadata for diff.";
+ }
+
+ revision 2017-02-20 {
+ description
+ "Added metadata for NETCONF's edit-config manipulation with ordered
+ lists and leaf-lists.";
+ reference
+ "RFC 7950: The YANG 1.1 Data Modeling Language";
+ }
+
+ revision 2016-02-11 {
+ description
+ "Initial revision";
+ reference
+ "RFC 6020: YANG - A Data Modeling Language for
+ the Network Configuration Protocol (NETCONF)";
+ }
+
+ md:annotation insert {
+ type enumeration {
+ enum first;
+ enum last;
+ enum before;
+ enum after;
+ }
+ reference "RFC7950 section 7.8.6. and section 7.7.9.";
+ description
+ "In user ordered leaf-list, this attribute can be used to control
+ where in the leaf-list the entry is inserted. It can be used during
+ the NETCONF <edit-config> \"create\" operations to insert a new list or
+ leaf-list entry, or during \"merge\" or \"replace\" operations to insert
+ a new list or leaf-list entry or move an existing one.
+
+ If the value is \"before\" or \"after\", the \"value\"/\"key\" attribute
+ MUST also be used to specify an existing entry in the list or leaf-list.
+
+ If no \"insert\" attribute is present in the \"create\" operation, it
+ defaults to \"last\".";
+ }
+
+ md:annotation value {
+ type string;
+ reference "RFC7950 section 7.7.9.";
+ description
+ "In user ordered leaf-list, this attribute must be used if the attribute
+ insert is used and specifies before/after which existing instance the
+ new instance should be inserted.";
+ }
+
+ md:annotation key {
+ type string;
+ reference "RFC7950 section 7.8.6.";
+ description
+ "In user ordered list, this attribute must be used if the attribute
+ insert is used and specifies before/after which existing instance the
+ new instance should be inserted.";
+ }
+
+ md:annotation position {
+ type union {
+ type empty;
+ type uint32 {
+ range 1..max;
+ }
+ }
+ description
+ "In key-less list or state leaf-list, this attribute must be used if
+ the attribute insert is used and specifies the instance position
+ before/after which the new instance should be inserted.";
+ }
+
+ md:annotation operation {
+ type enumeration {
+ enum none {
+ description
+ "The node existed in both data trees but there is a nested node
+ with another operation. In case of a leaf, only its default
+ flag changed.";
+ }
+ enum create {
+ description
+ "The node did not exist in the first tree and was created in the
+ second tree.";
+ }
+ enum delete {
+ description
+ "The node existed in the first tree and was deleted in the second
+ tree.";
+ }
+ enum replace {
+ description
+ "The node value was changed or the node was moved for
+ leaves/anyxml/anydata and user-ordered lists/leaf-lists,
+ respectively.";
+ }
+ }
+ reference "RFC6241 section 7.2.";
+ description
+ "Operation of a node in a diff. If a node has no operation,
+ it is inherited from its nearest parent with an operation.
+ Top-level nodes must always have an operation.
+
+ User-ordered lists/leaf-lists with operation 'create' and
+ 'replace' MUST also have the 'key', 'value', or 'position'
+ metadata defined. It specifies the preceding instance.
+ In case the value of this metadata is empty, the node was
+ created/moved on the first position.
+
+ All the operations keep the meaning of edit-config operations
+ with similar names but some are further restricted, meaning
+ they are used for only a subset of use-cases.";
+ }
+
+ md:annotation orig-default {
+ type boolean;
+ description
+ "Information about the previous default state of the node.";
+ }
+
+ md:annotation orig-value {
+ type string;
+ description
+ "Previous value of a changed leaf. Alternatively, its meaning
+ is the same as the \"value\" attribute but identifies the original
+ leaf-list instance rather than the new one.";
+ }
+
+ md:annotation orig-key {
+ type string;
+ description
+ "Its meaning is the same as the \"key\" attribute but identifies
+ the original list instance rather than the new one.";
+ }
+
+ md:annotation orig-position {
+ type union {
+ type empty;
+ type uint32 {
+ range 1..max;
+ }
+ }
+ description
+ "Its meaning is the same as the \"position\" attribute but identifies
+ the original list instance rather than the new one.";
+ }
+}