- From: Dave Reynolds <der@hplb.hpl.hp.com>
- Date: Sun, 17 Aug 2008 10:18:22 +0100
- To: kifer@cs.sunysb.edu
- Cc: RIF WG <public-rif-wg@w3.org>
Michael Kifer wrote:
>
>
> On Fri, 15 Aug 2008 16:07:45 +0100
> Dave Reynolds <der@hplb.hpl.hp.com> wrote:
>
>> (c) some genSym builtin
>
> Just 0.02c: this cannot be in the Core or in BLD.
Surely it could if it was deterministic (in which case genSym is not a
great choice of name). Perhaps something like:
"""
func:genSym
(?arg1, ... ?argn; func:genSym(?arg1, ... ?argn))
Generates and returns a constant uniquely determined by the values of
the n arguments. This constant takes the form:
"gensym:ID"^^rif:local
where ID is a string uniquely determined by the values of the arguments
?arg1 through to ?argn. For example, this might be a digest of the
concatenation of the canonical lexical forms for each argument.
"""
Thus to use it to generate skolem constants the rule author would need
to explicitly include a rule identifier and the values of the
universally quantified variables in the set of genSym arguments.
Would something along those lines be reasonable?
Dave
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Received on Sunday, 17 August 2008 09:18:50 UTC