Hi, derived-from is defined as:
boolean derived-from(node-set nodes, string module-name, string identity-name) The derived-from() function returns true if the first node in document order in the argument "nodes" is a node of type identityref, and its value is an identity that is derived from the identity "identity-name" defined in the YANG module "module-name"; otherwise it returns false. The "first node in the node set" doesn't work well with leaf lists. I suggest this change: NEW: The derived-from() function returns true if any node in the argument "nodes" is a node of type identityref, and its value is an identity that is derived from the identity "identity-name" defined in the YANG module "module-name"; otherwise it returns false. (and similar for derived-from-or-self) As an example, consider this model: leaf-list yang-protocol { type identityref { base yang-protocol; } } and this query: /modules/module[not derived-from-or-self(restricted-protocol, "ietf-yang-library", "netconf-1.1")] /martin _______________________________________________ netmod mailing list netmod@ietf.org https://www.ietf.org/mailman/listinfo/netmod