W3C home > Mailing lists > Public > www-rdf-rules@w3.org > November 2001

Scope (was RE: newbie)

From: Seaborne, Andy <Andy_Seaborne@hplb.hpl.hp.com>
Date: Wed, 7 Nov 2001 09:56:25 -0000
Message-ID: <5E13A1874524D411A876006008CD059F24E55D@0-mail-1.hpl.hp.com>
To: "'www-rdf-rules@w3.org'" <www-rdf-rules@w3.org>
Gerd Wagner wrote:
> >Notice that this list is only concerned with a restricted
> >form of 1) [declarative logic programming - ed].

and

> Has there ever been a discussion on uses of rules other than
> for enhancing RDFS taxonomies/ontologies on this list?

The rationale for this mailing list is in:

http://lists.w3.org/Archives/Public/www-rdf-rules/2001Sep/0000.html

<quote>
Welcome to the www-rdf-rules mailing list. Ralph Swick and Tim
Berners-Lee created this list for the discussion of queries and
rules for RDF data. Likely topics include:

  - APIs for queries, assertions and rule-based systems.
  - Wire protocols for these APIs.
  - User interface and query/rule language descriptions.
  - Implementation details.
  - Unifying framework for inference rules and query systems.
</quote>

which is somewhat wider than just for ontology.

Also:
http://lists.w3.org/Archives/Public/www-rdf-rules/2001Jul/0000.html

<quote>
This is a subgroup of RDF Interest to discuss rules and query for RDF and
DAML+OIL.  It may later recommend that a working group be started for
Rules/Query.
</quote>

In particular, this is neutral to the use of rules and also places equals
weight on query and rules.

Query has been explored in [A] and elsewhere; there are many experimental
systems.  Rules is an active area of discovery.  So, although related, the
state of query work and the state of rules work are at different stages
IMHO.  Rules can encompass query;  but that is not to say that only rules
systems should be considered.  The various experimental query systems show
that there can be a natural point of expressive query power which is useful
and natural for application developers.

	Andy

[A] http://www.ilrt.bris.ac.uk/discovery/rdf-dev/purls/papers/QL98-enabling/

-----Original Message-----
From: Wagner, G.R. [mailto:G.R.Wagner@tm.tue.nl]
Sent: 25 October 2001 13:54
To: 'Pat Hayes'
Cc: www-rdf-rules@w3.org
Subject: RE: newbie


> >What do you mean by "rule based system"?
> >Do you mean rules in the sense of
> >
> >1) declarative logic programming (or deductive databases)
> >for defining derived concepts and heuristics (without any
> >state-changing effects)? These rules are called "derivation
> >rules" in RuleML.
> >
> >2) SQL triggers (or "event-condition-action rules") for
> >specifying the reactive behavior of a system in response to
> >events? These rules are called "reaction rules" in RuleML.
> >They specify state changes in their head/consequent, and
> >they may "call" derivation rules in their body/antecedent.
> >
> >3) production rule systems like JESS? They are just another
> >programming language based on the rule metaphor but without
> >any precise semantics for rules.
> >
> >Notice that this list is only concerned with a restricted
> >form of 1).
> 
> Has that been established? (When??) I thought that all 
> options were still open.

Has there ever been a discussion on uses of rules other than
for enhancing RDFS taxonomies/ontologies on this list?

-Gerd

--------------------------------------------
Gerd Wagner        Email: G.Wagner@tm.tue.nl
http://tmitwww.tm.tue.nl/staff/gwagner
Eindhoven University of Technology
Faculty of Technology Management
Department of Information & Technology 
Received on Wednesday, 7 November 2001 04:56:40 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 22:46:14 UTC