- From: Peter F. Patel-Schneider <pfps@research.bell-labs.com>
- Date: Wed, 11 Apr 2001 19:31:23 -0400
- To: bxk24@psu.edu
- Cc: www-rdf-interest@w3.org
Let me illustrate with an informal example. Suppose I said that you had (exactly) three siblings that would be using an unqualified cardinality restriction. If, however, I said that you had at least two siblings that were doctors and (exactly) one that was a lawyer that would be using qualified cardinality restrictions. Due to the difficulty of creating complex constructs in RDF without also creating their component constructs, qualified cardinality restrictions use cardinalityQ and hasClassQ. If they used cardinality and hasClass, a qualified cardinality restriction would have a piece that would be interpreted as an unqualified cardinality restriction. In the example above, I would also have said that you have at least two siblings and exactly one sibling, which is not what I wanted to say. Peter F. Patel-Schneider Bell Labs Research PS: These extra ``keywords'' are not needed in representation languages with a richer syntactic structure. See OIL for an example. From: "K. Boonserm" <bxk24@psu.edu> Subject: Qualified Cardinality Date: Wed, 11 Apr 2001 14:35:05 -0400 > Hi, > > I am confused about the different between the 'qualified' and 'unqualitied' > cardinality and hasClass (e.g., cardinalityQ and cardinality, hasClass and > hasClassQ)? If anybody can provide me explanation or pointer to other > reading, I would be appreciated? > > thank you, > Boon > ---------------------------------------------------------------------- > Boonserm (Boon) Kulvatunyou > Industrial & Manufacturing Engineering PSU > email: bxk24@psu.edu > phone: 814-659-1963, 814-862-8509 > http://cim4.ie.psu.edu:12/serm/mypage.html >
Received on Wednesday, 11 April 2001 19:32:14 UTC