Change history of GDPDM from version
May 10, 2004 to version August 1, 2004.
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- Changed field: field_coord_x to coord_x and
  field_coord_y to coord_y in table div_obs_unit.

- field generation_id in table div_stock changed to
  "Not required."

- In descriptions, added MOBILITY and SEQUENCE as
  possible value for field: poly_type in table
  div_poly_type.

- Added tables cdv_passport_group and cdv_passport_set
  to allow groupings of passports.

- Added definitions for fields: position and length
  in div_allele_assay table.

- Renamed div_locus table to cdv_map_feature.
  Definitions for fields genetic_map and
  genetic_position were updated.  Field xref_map_id
  was added.

- Renamed div_marker table to cdv_marker.

- Added table div_taxonomy containing fields
  div_taxonomy_id, genus, species,
  subspecies, subtaxa, race, and population which were
  removed from the div_passport table.  Now
  div_passport has a foreign key pointing to this
  table.

- Added table div_accession_collecting containing
  fields div_accession_collecting_id, locality_id,
  collector, collnumb, collsrc, and collcode which
  were removed from the div_passport table.  Now
  div_passport has a foreign key pointing to
  this table.

- Deleted following fields from div_passport table.
  reference, secondary_source, instcode, spauthor,
  subtauthor, cropname, acqdate, colldate, bredcode,
  donorcode, donornumb, othernumb, duplsite, and
  storage.

- Added table div_synonym to define synonyms for
  div_passport table.  This makes the local_name
  field in the passport table obsolete so it
  has been deleted.

- Added table cdv_curated_allele to identify curated
  alleles corresponding to entries in the div_allele
  table.  Also, added table cdv_allele_curated_allele
  to managed many-to-many relationship between
  div_allele and cdv_curated_allele.

- Added table cdv_curation to track who assigned
  curated allele.

- Added table cdv_reason to have controlled vocabulary
  of reasons for creating a curation entry.