Review PDBEntry.Type enum - use FileFormatI instead?

JAL-2344 created an enum FileFormat including values for mmCIF and PDB.
Can these be used in place of enum PDBEntry.Type?
Need to review:
1) Type enum includes FILE as a value - unclear how this is used
2) Type enum fields ext (e.g "cif") and format (e.g. "mmcif") have specific uses (for Chimera Open command, and dbfetch, respectively) - would need to decouple these values from the FileFormat properties
3) PDBEntry.type is a String which can be set directly or via a Type enum - code design needs to be clearer here e.g.
  - Uniprot.uniprotEntryToSequenceI() tests for "EMBL" or "Ensembl" - are these ever set? if so it suggests a separate property rather than overloading the meaning of PDBEntry.type