YANG Instance Identifiers

• All instance IDs can be specified with Xpath:

• • Xpath absolute path expression

• The path from the conceptual <config> root to the object instance is the identifier value

• • a canonical format conversion algorithm is needed
  • a canonical instance order algorithm is needed

• Example:

• • # ID for address (2nd in unnamed list) /interfaces/interface[name=‘eth0’]/addresses/address[2]
  • # ID for phone /foo/bar[x=3][y=4]/baz/acme-stuff[name=‘fred’]/phone