A Knowledge Discovery API?

Imielinski (1996):
- DM/KDD has to be able to generate, query and manipulate rules (i.e., hypotheses) as well as tuples.
- proposed Application Programmer Interface (API) based in query language extensions
  - free form ad hoc rule querying and generation, with facilities for query optimization and cognitive bandwidth (cf. “Rendezvous”)
  - embedding new/extended query language within the host database language