Doctrine inheritance stupidity

gistfile1.yml

# THIS DOESN'T WORK

Atom:
  columns:
    title:          { type: string(255) }

News:
  columns:
    article:        { type: text }
  inheritance:
    extends:        Atom
    type:           column_aggregation
    keyField:       type
    keyValue:       NewsArticle

Comment:
  columns:
    atom_id:        { type: integer(5) }
    comment:        { type: text }
  relations:
    Atom:
      local:        atom_id
      foreign:      id
      foreignAlias: Comments



# THIS DOES

Atom:
  columns:
    title:          { type: string(255) }
  relations:
    Comments:
      class:        Comment
      local:        id
      foreign:      atom_id
      foreignAlias: Atom

News:
  columns:
    article:        { type: text }
  inheritance:
    extends:        Atom
    type:           column_aggregation
    keyField:       type
    keyValue:       NewsArticle

Comment:
  columns:
    atom_id:        { type: integer(5) }
    comment:        { type: text }