Difficulties with OWL DL

• Pretty expressive, but not that expressive

  • Can’t define uncleOf!

• Pretty scalable, but not that scalable

  • This ain’t no database
  • Pathological cases are crippling
    • It remains to be seen if the Semantic Web normal case is pathological
  • Simple implementations fair quite poorly
  • No known (or published) OWL DL algorithm

• Layered DL in RDF/XML is painful to write

Notes: