
402 ◾ Appendix C
graphs (see uraisingham 1992). Following this, Hinke and Delugach carried
out an extensive investigation on the use of conceptual graphs (see Delugach and
Hinke 1992). Around the mid- to late 1990s, uraisingham, Binns, Marks, and
Collins explored various other conceptual structures such as hypersemantic data
models (see Marks et al. 1994) and deductive object models (see Collins et al.
1996). Figure C.7 briefly illustrates the use of conceptual structures.
Another direction worth mentioning is uraisingham’s work on multilevel
deductive databases and the logic called nonmonotonic typed multilevel logic
(NTML). e idea here is ...