Checks if the string is QName and if it is so then replaces namespace prefix to the full namespace IRI. Otherwise signals error if the argument is local IRI without a prefix.
SQL> SELECT __xml_nsexpand_iristr ('foaf:knows'); __xml_nsexpand_iristr VARCHAR _______________________________________________________________________________ http://xmlns.com/foaf/0.1/knows 1 Rows. -- 0 msec.
SQL> SELECT __xml_nsexpand_iristr ('no-namespace-prefix-iri'); *** Error 22023: [Virtuoso Driver][Virtuoso Server]SR649: No XML namespace prefix in string "no-namespace-prefix-iri" in __xml_nsexpand_iristr:(BIF), __01 => 'no-namespace-prefix-iri', <Top Level> at line 5 of Top-Level: SELECT __xml_nsexpand_iristr ('no-namespace-prefix-iri')
SQL> SELECT __xml_nsexpand_iristr ('no-such-prefix:local'); *** Error 22023: [Virtuoso Driver][Virtuoso Server]SR648: Unknown XML namespace prefix in IRI "no-such-prefix:local" in __xml_nsexpand_iristr:(BIF), __01 => 'no-such-prefix:local', <Top Level> at line 6 of Top-Level: SELECT __xml_nsexpand_iristr ('no-such-prefix:local')
SQL> SELECT __xml_ns_iristr ('no-such-prefix', 'knows'); *** Error 22023: [Virtuoso Driver][Virtuoso Server]SR648: Unknown XML namespace prefix "no-such-prefix" in __xml_ns_iristr:(BIF), __01 => 'no-such-prefix', __02 => 'knows', <Top Level> at line 7 of Top-Level: SELECT __xml_ns_iristr ('no-such-prefix', 'knows')