Indomethacin for prevention of heterotopic ossification after total hip arthroplasty.

In this report the conceptual query language ConQuer-92 is introduced. Thisquery language serves as the backbone of InfoAssistant's query facilities.Furthermore, this language can also be used for the specification of derivationrules (e.g. subtype defining rules) and textual constraints in InfoModeler.This report is solely concerned with a formal definition, and the explanationthereof, of ConQuer-92. The implementation of ConQuer-92 in SQL-92 will betreated in a separate report