check if the given identifier is valid . it is valid if it is empty or a valid uri . the scheme of the participant identifier must be in the form of a uri . the scheme of the document identifier must be in the form of a uri . concode_field_sep BDXRIdentifierHelper s_aInstance concode_field_sep boolean isValidIdentifierValue
boolean function ( @ Nullable final String arg0 ) { if ( arg0 == null || arg0 . length ( ) == 0 ) return true ; return URLHelper . getAsURI ( arg0 ) != null ; }