Regarding the issue about a document being both Primary and Secondary evidence, the GEDCOM specification accommodates that. Where a Fact cites a Source it is the Citation that has the Assessment option of Primary, Secondary, Questionable, Unreliable and not the Source Record. So the Marriage Event can cite the Marriage Certificate Source Record with an Assessment of Primary evidence. Whereas a Birth Event can cite the same Marriage Certificate Source with an Assessment of Secondary or Questionable since the Age may be in doubt. Regards, Mike Tate