"headline" in (bio)schemas.org type "Dataset" too crowded for some entries

[hujo91]

For some entries (see e.g. MassBank Record: PT112200) the "headline" or the "RECORD_TITLE:" is very long due to the naming of all synonyms, which makes exporting or harvesting difficult.
It would therefore be desirable if the "headline" resp. the "RECORD_TITLE:" could be shorter like e.g. in this entry (MassBank Record: PS045401) containing only one name and not all available synonyms. It is sufficient if the collection of all synonyms is present in "alternateName".