[YANGTOOLS-1387] XPath: XPath keyword not accepted as valid XPath expression

Relates — Mon, 10 Jan 2022 11:54:57 +0000

If data node is one of the XPath keywords (and, div, mod, or), then the data node name alone is not considered a valid XPath expression.

For example, the following data model is not accepted because and is not a valid XPath expression based on the Antlr specification used by Yangtools:

module xpath-test {
  yang-version 1.1;
  namespace "urn:opendaylight:must-test";
  prefix "mt";

  revision "2021-12-16";

  container foo {
    list bar {
      key "baz";
      must "and";
      leaf baz {
        type string;
      }
      list and {
        key "baz";
        leaf baz {
          type string;
        }
      }
    }
  }
}

And there is such a data model actually used by Cisco routers (Cisco-IOS-XR-um-router-pim-cfg.yang), and this is preventing Silicon or later version from mounting the devices.

OpenDaylight JIRA

[YANGTOOLS-1387] XPath: XPath keyword not accepted as valid XPath expression