From: Benjamin Grosof (bgrosof@mit.edu)
Date: 07/20/04
Hi Harold and all,
At 06:28 PM 7/19/2004 -0400, Boley, Harold wrote:
> > > This is a prime reason why in RuleML
> > > the rule label is an ind (and in the courteous extension more
> > > generally an ind or cterm) child of the label, rather than
> > > just a URI href.
> >
> > [Better don't use this RulerML jargon ("ind" and "cterm") in
> > a public discussion - others are not familiar with these
> > abbreviations.]
>
>I guess you changed the subject line "SWRL RuleML Suggestion" to
>"SWR/ RuleML rule names", both containing "RuleML". I think it is
>OK if an email with subject line xyz uses xyz jargon.
>
> > There may be some confusion here coming from the use of "ind"
> > that does not stand for "individual" but for "individual
> > constant", which is a name and not an individual.
>
>Looking at markup such as <ind>abc</ind>, it should be clear that
>"abc" is the name.
>
>RuleML also allows general terms as labels for rules and rulebases.
>
>In particular, a complex term (cterm) that is non-ground permits
>parameterized access to a rule via instantiations of its label. Cf.:
>http://projects.semwebcentral.org/pipermail/forum-flogic/2004-June/000002.ht
>ml
>
>Similarly, rulebases (i.e., rule modules) can be parameterized. Cf.
>TRIPLE models/modules: http://icec.net/download/Triple_Presentation.pdf
>
> > Again: the rule is the individual, and its label is its name
> > but not another individual.
>
>How does this rule-as-individual view transfer to a parameterized rule
>labeled by a non-ground cterm?
In case of non-ground label cterm, the label cterm should mention only
variables appearing in the rule body/head part,
and each instantiation of the label cterm names the corresponding (set of)
instance(s) of the rule.
This is useful for prioritization, provenance, etc.
Benjamin
>-- Harold
________________________________________________________________________________________________
Prof. Benjamin Grosof
Web Technologies for E-Commerce, Business Policies, E-Contracting, Rules,
XML, Agents, Semantic Web Services
MIT Sloan School of Management, Information Technology group
http://ebusiness.mit.edu/bgrosof or http://www.mit.edu/~bgrosof
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