. "1:0" . . . . . "Wright, Sue Ellen" . "1951: An optional part of a headword.\n1951; examples? The question arises whether these are true options or whether the options reflect synonyms or hyponyms (e.g., barrage, barrage de retenue). The question is not whether 1951 should use this markup, but rather how to map this markup in a global environment." . "optionalElement" .