id: http://example.org/tests/issue177

types:
  string:
    base: str
    uri: xsd:string
  integer:
    base: int
    uri: xsd:int


classes:
  c1:
    tree_root: true
    slots:
      - sa
      - sb

  c2:
    slots:
      - sb

slots:
  sa:
  sb:
    range: integer
