Provided the Unicode character number unicodenumber, this function returns the equivalent character entity name. For example, if you were to give unicodenumber the value of 920, the function would return the value 'Theta'.

If the doc parameter is not provided, the current document will be used.

If there is no character entity name for the unicode character number unicodenumber, the function returns an empty string.

Note that the returned character entity names are case-sensitive and depend on the document type you are using. Use the Arbortext-path/lib/charent.cf file a reference to character entity names.