Tag:
  columns:
#    id:
#      type: integer(4)
#      primary: true
#      autoincrement: true
    name:
      type:           string(100)
    is_triple:        
      type:           boolean
    triple_namespace: 
      type:           string(100)
    triple_key:       
      type:           string(100)
    triple_value:     
      type:           string(100)
  indexes:
    name:
      # boutell: this needs to be an array not just a string.
      # The Doctrine MySQL driver was either honoring or ignoring it.
      # The SQLite driver throws an exception, and justly so. Same for
      # the other three indexes here. The indexes on Tagging were
      # set up correctly
      fields: [name]
    triple1:
      fields: [triple_namespace]
    triple2:
      fields: [triple_key]
    triple3:
      fields: [triple_value]
        
Tagging:
  columns:
#    id:
#      type: integer(4)
#      primary: true
#      autoincrement: true
    tag_id:           
      type:           integer
      notnull:        true
    taggable_model:   
      type:           string(30)
    taggable_id:      
      type:           integer
  relations:
    Tag:
  indexes:
    tag:
      fields: [tag_id]
    taggable:
      fields: [taggable_model, taggable_id]
  attributes:
    # don't export constraints. This is necessary because multiple models can 
    #  join Tagging on taggable_id
    export: [ all, constraints ]