 TYPE
    fmt$optional_file_label = SEQ ( * );

{ The first item in the sequence is the fmt$optional_label_directory.}
{ For each file_attribute_key whose corresponding entry in the }
{ optional_label_directory is 'TRUE' there follows in the sequence the}
{ 'source' and 'value' of the attribute.  These pairs are NEXTed in the}
{}
{ An attribute (source,value) is stored in the optional_file_label only}
{ if its source is not amc$undefined_attribute.}
{}
