what exactly is the conceptual model?

• semantic model --> ERM
• logical model --> relational schema / XML schema
• physical model --> hash tables / how to handle stuff on the harddisk

and i heard about the conceptual modell / conceptual schema / conceptual modelling. however:

• sometimes the semantic modell is explaint to be a conceptual modell, or .. conceptualization leeds to a semantic modell.
• sometimes the logical modell is explaint to be a coceptual one (this way we learned it in our course).

Now i'm writing about ontologies defined as, "a specification of an explicit conceptualization".
Would you think this "conceptualization" refers to the semantic oder the logical model?

thanx for any help,
chris Received on Mon Jul 02 2007 - 23:08:11 CEST