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<?cocoon-format type="text/html"><html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>RuleML Homepage</title>
<style type="text/css">
h1 { font-size: 32pt; font-weight: bold }
h2 { font-size: 16pt; font-weight: bold }
ul { line-height: 120% }
ol { line-height: 120% }
p { line-height: 100% }
</style>
</head>
<body bgcolor="#FFFFFF">
<center>
<a href="http://www.ruleml.org"><img src="http://www.ruleml.org/images/RuleMLlogo2005.jpg" border="none" alt="RuleML"></a>
<br>
<h1>The Rule Markup Initiative</h1>
</center>
<br>
<p>
The RuleML Initiative is an international non-profit organization covering all aspects of Web rules and their interoperation, with a <a href="#Structure">Structure</a> and Technical Groups that center on
RuleML specification, tool, and application development. Around RuleML, an open network of individuals and groups from both industry and academia has emerged,
having a shared interest in modern rule topics, including the interoperation of Semantic Web rules.
The RuleML Initiative has been collaborating with OASIS on <a href="http://www.legalxml.org/">Legal XML</a>, <a href="http://policy.ruleml.org/">Policy RuleML</a>, and related efforts since 2004.
The Initiative has further been interacting with the developers of ISO Common Logic (<a href="http://cl.tamu.edu/">CL</a>), which became an International Standard, First edition, in October 2007.
RuleML is also a member of OMG, contributing to its Semantics of Business Vocabulary and Business Rules (<a href="http://www.omg.org/spec/SBVR/">SBVR</a>),
which went into Version 1.0 in January 2008, and to its Production Rule Representation (<a href="http://www.omg.org/spec/PRR/">PRR</a>), which went into Version 1.0 in December 2009.
Moreover, participants of the RuleML Initiative have supported the development of the W3C Rule Interchange Format (<a href="http://www.w3.org/2005/rules/wiki/RIF_Working_Group">RIF</a>),
which attained Recommendation status in June 2010.
The annual <a href="http://en.wikipedia.org/wiki/RuleML_Symposium">RuleML Symposium</a>
has taken the lead in bringing together delegates from industry and academia who share this interest focus in Web rules.
</p>
<p>
RuleML (Rule Markup Language) is a unifying family of XML-serialized rule languages spanning across all industrially relevant kinds of Web rules.
It accommodates and extends other recent rule languages, building interoperation bridges between them.
The <a href="#Specification">Specification</a> of RuleML is currently being developed from <a href="/0.91/">Version 0.91</a> to <a href="/1.0/">Version 1.0</a>.
</p>
<table border="0" width="100%" cellspacing="7" cellpadding="0" align="center">
<tr>
<td valign="TOP" width="30%" bgcolor="#FFFFFF"></td>
<td valign="TOP" width="40%" bgcolor="#FFFFFF"></td>
<td valign="TOP" width="30%" bgcolor="#FFFFFF"></td>
</tr>
<tr>
<td valign="TOP" width="30%" bgcolor="#FFCCCC">
<h2>Contents</h2>
<ul>
<li><a href="#Initiative">The Initiative</a></li>
<li><a href="#Uses">Uses</a></li>
<li><a href="#Scope">Scope</a></li>
<li><a href="#Participants-Logos">Participants' Logos</a></li>
<li><a href="#Participants-Systems">Participants' Systems (Updated: 2008-07-22)</a></li>
<li><a href="#Steps">Initial Steps</a></li>
<li><a href="#Design">Design</a></li>
<li><a href="#Specification">Specification</a></li>
<li><a href="#Queries">Queries</a></li>
<li><a href="#OO">Object-Oriented RuleML</a></li>
<li><a href="#ASP">ASP RuleML (Updated: 2006-04-06)</a></li>
<li><a href="#RIF">RIF (Initiated: 2010-08-14)</a></li>
<li><a href="#RDF">RDF</a></li>
<li><a href="#Lite">RuleML Lite</a></li>
<li><a href="#FOL">FOL RuleML</a></li>
<li><a href="#Induction">Induction</a></li>
<li><a href="#Translators">Translators</a></li>
<li><a href="#Engines">Engines (Updated: 2008-06-30)</a></li>
<li><a href="#POSL">Positional-Slotted Language</a></li>
<li><a href="#Interfaces">User Interfaces (Updated: 2011-03-21)</a></li>
<li><a href="#Library">Rulebase Library (Updated: 2010-12-28)</a></li>
<li><a href="#Papers-Publications">Papers-Publications (Updated: 2010-02-07)</a></li>
<li><a href="#Structure">Structure (Updated: 2008-06-30)</a></li>
<li><a href="#Contacts">Contacts</a></li>
</ul>
</td>
<td valign="TOP" width="40%" align="left">
<h2>News-Events</h2>
<ul>
<li>
2011-03-17:
<a href="http://www.alt2is.com">Athan Services</a>
and RuleML have started a project
on re-engineering and improving the RuleML XSDs in
<a href="http://relaxng.org/">Relax NG</a>.
The first result of this project is a version of RuleML 0.91 in Relax NG,
which implements bindatalog in the normal form.
The modular design of the Relax NG schema will allow greater flexibility
in customizing language features, increased ease of development,
testing, and documentation.
The design also prepares the way for the second phase
of the project, the alignment of a subset of RuleML with
<a href="http://common-logic.org/">Common Logic.</a>
Items currently available for alpha-testing from the RuleML website
include the
<a href="http://ruleml.org/0.91/relaxng">Relax NG schema</a>,
<a href="http://code.google.com/p/jing-trang/">Trang</a>-generated <a href="http://ruleml.org/0.91/trang">XSD schema</a>, and
<a href="http://www.oxygenxml.com/">oXygen</a>-generated
<a href="http://ruleml.org/0.91/docng/bindatalog_normal/">documentation</a>.
The principles of this approach are discussed on the <a href="http://wiki.ruleml.org/index.php/Relax_NG">Relax NG - RuleML Wiki</a> Page.
</li>
<li>
<b>Call for Papers for the 5th International Symposium on Rules: Research Based, Industry Focused</b> (<a href="http://2011.ruleml.org">RuleML-2011</a>).
In 2011, two instalments of the RuleML Symposium will take place.
The first one will be held in conjunction with the
International Joint Conference on Artificial Intelligence (<a href="http://ijcai-11.iiia.csic.es/">IJCAI 2011</a>)
in Barcelona, Spain, July 16th-22th, 2011.
The second one will be co-located with the Business Rules
Forum 2011 (<a href="http://www.businessrulesforum.com/">BRF 2011</a>) to be held in Fort Lauderdale, Florida, USA, November 3rd-5th, 2011. The
<a href="http://2011.ruleml.org/america/">RuleML-2011@BRF</a> instalment will include the <a href="http://2011.ruleml.org/america/?page_id=126">RuleML Challenge Award</a>, which this year will be dedicated to Rules and Ontologies.
For RuleML-2011@IJCAI a selection of best papers will be presented during a
joint session with IJCAI, and the authors of these papers will be invited to
submit a revised paper for inclusion into the IJCAI proceedings.
</li>
<li>
2011-01-18: <a href="http://responder.ruleml.org/">Rule Responder</a> and <a href="http://lpis.csd.auth.gr/systems/emerald/">EMERALD</a> are multi-agent systems assisting user communities based on Semantic Web and multi-agent standards.
The <a href="http://ruleml.org/press/EmeraldRuleMLResponderPressRelease-2010-04-23.pdf">Collaboration between RuleML and Aristotle University</a> made these multi-agent systems
interoperable in order to automate collaboration across communities using a declarative, knowledge-based approach.
Bidirectional RuleML gateways between EMERALD and Rule Responder were built, which could also be adapted for other interoperation needs.
Multi-step interaction scenarios among agents based on the <a href="http://ruleml.org/SymposiumPlanner/">SymposiumPlanner</a> use case have been deployed through the <a href="http://ruleml.org/RuleML-2010/RuleResponder/RuleResponder.htm">RuleML-2010 Symposium Q&A web page</a>.
Details are found on the <a href="http://lpis.csd.auth.gr/systems/EMERALDRR/">EMERALD Rule Responder website</a>.
</li>
<li>2010-12-28: The well-known Wine Ontology is made available as a sizeable RuleML Use Case in Web rule conversion, upgrading, and normalization (<a href="http://ruleml.org/usecases/wineonto/">WineOnto</a>)
</li>
<li>2010-10-21: <a href="http://2010.ruleml.org">RuleML-2010</a> presentations for the Washington DC Semantic Web Meetup Group (<a href="http://www.meetup.com/semweb-31/calendar/14349685/">Lotico Washington Semantic Web</a>)
start with brief Introduction slides (<a href="http://files.meetup.com/987383/RuleML-SemWeb-Meetup-2010.pptx">RuleML - Where Web Rule Research Meets Industry</a>)
</li>
<li>
<b>The 4th International Web Rule Symposium: Research Based and Industry Focused</b>
(<a href="http://2010.ruleml.org">RuleML-2010</a>) will take place
in Washington, DC, USA, October 21-23, 2010, co-located with the Business Rules Forum Conference 2010
(<a href="http://www.businessrulesforum.com">BR Forum</a>).
RuleML-2010 is the premier industry-focused event to discuss and exchange new ideas,
practical developments and experiences on all topics related to the engineering,
management, integration, interoperation and interchange of rules in open
distributed environments such as the Web or Enterprise Systems. RuleML-2010 will enable delegates
to better understand Web/Enterprise rules and rule-based event processing technologies
and their potential, and how to exploit these technologies in their own organizations.
The proceedings will <a href="http://www.springer.com/computer/information+systems+and+applications/book/978-3-642-04984-2">again</a>
be published as Springer LNCS.
<a href="http://logic.stanford.edu/people/genesereth/">Michael Genesereth</a> and
<a href="http://www.drrw.net/">David Webber</a>
will give keynotes.
Go to <a href="http://2010.ruleml.org/call-for-papers.html">RuleML-2010 Call for Papers</a>
and then to <a href="http://www.csw.inf.fu-berlin.de/ruleml2010/ruleml-2010-challenge.html">RuleML-2010 Challenge</a>:
<ul>
<li>
Extended Abstract submission deadline: June 6, 2010
</li>
<li>
Extended Paper Submission deadline: June 11, 2010
</li>
<li>
Challenge Paper Submission deadline (EXTENDED): Aug. 27, 2010
</li>
</ul>
</li>
<li>Recent <a href="http://responder.ruleml.org/">Rule Responder</a> instantiations include
<ul>
<li>
<a href="http://ruleml.org/SymposiumPlanner">SymposiumPlanner</a>-2009/2010,
</li>
<li>
<a href="http://ruleml.org/WellnessRules">WellnessRules</a>/<a href="http://ruleml.org/WellnessRules2">WellnessRules2</a>, and
</li>
<li>
<a href="http://ruleml.org/PatientSupporter">PatientSupporter</a>,
</li>
</ul>
using RuleML for (Prolog-N3) interchange.
</li>
<li>2010-06-22: With <a href="http://www.w3.org/2005/rules/wiki/RIF_FAQ#What_is_the_relationship_between_RuleML_and_RIF.3F">input from RuleML</a>,
the <a href="http://www.w3.org/2005/rules/wiki/RIF_Working_Group">W3C RIF Working Group</a> published
<a href="http://www.w3.org/News/2010#entry-8839">six recommendations and five related documents</a>.
See also <a href="#RIF">RIF RuleML</a> developments.
</li>
<li>
<b>Press Release</b>, Fredericton, Canada, Thessaloniki, Greece, April 23, 2010:
<a href="http://ruleml.org/press/EmeraldRuleMLResponderPressRelease-2010-04-23.pdf">RuleML and Aristotle University Collaborate on Rule-Based Multi-Agent System Emerald RuleML Responder</a>
</li>
<li>Call for Presentations/Participation: <b>Special Rules Track at <a href="http://semtech2010.semanticuniverse.com/">SemTech 2010</a>, co-organized by RuleML</b>.
For schedule and registration see: <a href="http://semtech2010.semanticuniverse.com/rules">Semantic Rules</a>
</li>
<li>The <a href="http://www.ruleml.org/inews.html">RuleML News-Events Archive</a> shows all previous news.
</li>
</ul>
</td>
<td valign="TOP" width="30%" bgcolor="#CCCCFF">
<h2>Resources</h2>
<p>
<b>Mission Statement:</b>
<p>
The goal of the Rule Markup Initiative is to develop RuleML as the
canonical Web language for rules using XML markup, formal semantics,
and efficient implementations.
</p>
<p>
RuleML covers the entire rule spectrum,
from derivation rules to transformation rules to
reaction rules. RuleML can thus specify queries and inferences in Web
ontologies, mappings between Web ontologies, and dynamic Web behaviors
of workflows, services, and agents.
</p>
<br>
<b>Mission Approach:</b>
<p>
Rather than focusing on academic research prototypes, RuleML is about rule
interoperation between industry standards (such as JSR 94, SQL'99, OCL,
BPMI, WSFL, XLang, XQuery, RQL, OWL, DAML-S, and ISO Prolog) as well as
established systems (CLIPS, Jess, ILOG JRules, Blaze Advisor, Versata,
MQWorkFlow, BizTalk, Savvion, etc.).
</p>
<p>
The Initiative develops a modular RuleML specification and transformations
from and to other rule standards/systems. Moreover, it coordinates the
development of tools to elicit, maintain, and execute RuleML rules.
It also collects use cases, e.g. on business rules and reactive services.
</p>
<br>
<b>Tutorial:</b>
<p>
The <a href="http://www.ruleml.org/papers/tutorial-ruleml.html">RuleML Tutorial</a>
has its current focus on the kernel Datalog sublanguage.
</p>
<br>
<b>Lists/Groups:</b>
<ul>
<li>
<a href="http://mail.ruleml.org/pipermail/ruleml-all/2003-November/000000.html">Subscribe</a> to our main mailing list:
<a href="http://mail.ruleml.org/pipermail/ruleml-all/">ruleml-all</a>.
</li>
<li>
Get up to date with the Fuzzy RuleML TG mailing list:
<a href="http://mail.ruleml.org/pipermail/fuzzy-tg/">fuzzy-tg</a>.
</li>
<li>
Peek into the Reaction Rules TG mailing list:
<a href="http://mail.ruleml.org/pipermail/reaction-tg/">reaction-tg</a>.
</li>
<li>
<a href="http://mail.jdrew.org/pipermail/jdrew-all/2005-June/000000.html">Consider</a> to join the engine mailing list:
<a href="http://mail.jdrew.org/pipermail/jdrew-all/">jdrew-all</a>.
</li>
<li>
Discuss Web rule-based agents on the Rule Responder TG mailing list:
<a href="http://tech.groups.yahoo.com/group/Rule_Responder/">responder-tg</a>.
</li>
<li>
Join the LinkedIn RuleML group or some of its subgoups:
<a href="http://www.google.ca/search?q=LinkedIn+RuleML+group">LinkedIn RuleML group</a>.
</li>
</ul>
</p>
<br>
<b>Challenge Demos:</b>
<p>
The page for <b><a href="http://ruleml-challenge.cs.nccu.edu.tw/?q=submitform">RuleML Challenge Demos</a></b>
has been created by the research group of
<a href="http://www.cs.nccu.edu.tw/~jong/">Yuh-Jong Hu</a> from the
<a href="http://www.cs.nccu.edu.tw/">Department of Computer Science</a> at the
National Chengchi University (<a href="http://www.nccu.edu.tw/">NCCU</a>), Taipei, Taiwan, where it is being maintained by Jack.
</p>
</td>
</tr>
</table>
<h2><a name="Initiative">The Initiative</a></h2>
<p>
The <a href="#Participants-Logos">participants</a> of the RuleML Initiative
constitute an open network of
individuals and groups from both industry and academia. We are not
commencing from zero but have done some work related to rule markup or have
actually proposed some specific tag set for rules.
Our main objective is to provide a basis for an integrated rule-markup approach
that will be beneficial to all involved and to the rule community
at large. This shall be achieved by having all participants
collaborate in establishing translations between existing tag sets and
in converging on a shared rule-markup vocabulary.
This RuleML kernel language can
serve as a specification for immediate rule interchange and can be gradually
extended - possibly together with <a href="#Related">related initiatives</a> -
towards a proposal that could be submitted to the
<a href="http://www.w3.org/">W3C</a>.
</p>
<h2><a name="Uses">Uses</a></h2>
<table border="1" cellpadding="5" bgcolor="#CCCCFF"><tr><td>
<a name="Example-English"></a>
If you want to review rule principles,
(then) you may look at
<a href="http://www.cs.nott.ac.uk/~sxp/ES3/index.htm">Rule-Based Expert Systems</a>. (<a href="insteps.html#Example-RuleML">BTW, this is itself a simple rule</a>.)
If you want to review XML principles,
you may go to the beginning of
<a href="http://www.dfki.uni-kl.de/km/knowmark/">Knowledge Markup Techniques</a>.
</td></tr></table>
<p>
Rules are being used for many interconnected purposes,
capturing regularities in
application domains such as the following:
<ul>
<li>Engineering: Diagnosis rules (also model-based approaches appreciate
and combine with rules, as described by Adnan Darwiche in
<a href="http://www.cs.ucla.edu/~darwiche/realize.ps">Model-based diagnosis under real-world constraints</a>,
AI Magazine, Summer 2000)
</li>
<li>Commerce: Business rules (including XML versions such as the
Business Rules Markup Language
(<a href="http://www.oasis-open.org/cover/brml.html">BRML</a>) of IBM's
<a href="http://www.research.ibm.com/rules/home.html">Business Rules for Electronic Commerce</a>
project)
</li>
<li>Law: Legal reasoning (Robert Kowalski and Marek Sergot have been
formalizing legal rules in an <a href="http://www-lp.doc.ic.ac.uk/ProjectPages/legal.html">Imperial College group</a>)
</li>
<li>Internet: Access authentication
(Tim Berners-Lee proposed registration engines that use authentication rules
<a href="http://www.w3.org/DesignIssues/Inconsistent.html">such as the following</a>:
Any person who was some time in the last 2 months an employee
of an organization which was some time in the last 2 months a
W3C member may register.)
</li>
</ul>
Rather than reinventing rule principles and markups in each such community,
the idea of RuleML is to 'package' the rule aspect of these domains and
and make it available as an
<a href="http://www.w3.org/TR/REC-xml-names/">(XML) namespace</a>,
<tt>.../RuleML</tt>, which can be mixed with
a namespace for
natural-language (<a href="http://www.w3.org/TR/xhtml1/">XHTML</a>) texts
and possible domain-specific namespaces
(much like <a href="http://www.w3.org/Math/">MathML</a> is mixed into
such domain texts).
</p>
<h2><a name="Scope">Scope</a></h2>
<p>
Rules can be stated (1) in natural language, (2) in some formal notation,
or (3) in a combination of both. Being in the third, 'semiformal' category,
the RuleML Initiative is working towards an XML-based markup language that
permits Web-based rule storage, interchange, retrieval, and firing/application.
</p>
<a name="Related"></a>
<p>
Markup standards and initiatives related to RuleML include:
<ul>
<li>Mathematical Markup Language
(<a href="http://www.w3.org/Math/">MathML</a>):
However, MathML's <i>Content Markup</i> is better suited for defining functions
rather than relations or general rules
</li>
<li>DARPA Agent Markup Language (<a href="http://www.daml.org/">DAML</a>):
While the contributing
<a href="http://www.cs.umd.edu/projects/plus/SHOE/">SHOE project</a>
has permitted Horn rules and a DAML-RULES is planned, the current
<a href="http://www.daml.org/language/">DAML+OIL</a> (March 2001)
does not yet include a specification of explicit inference rules
</li>
<li>Predictive Model Markup Language
(<a href="http://www.dmg.org/html/pmml_v1_1.html">PMML</a>):
With this XML-based language one can define and share various models
for data-mining results, including
<a href="http://www.dmg.org/html/assocrules.html">association rules</a>
</li>
<li>Attribute Grammars in XML (<a href="http://www.dfki.uni-kl.de/~boley/xmlag/attgramm/sld001.htm">AG-markup</a>):
For AG's semantic rules, there are various possible XML markups that are
similar to Horn-rule markup
</li>
<li>Extensible Stylesheet Language Transformations
(<a href="http://www.w3.org/TR/xslt">XSLT</a>):
This is a restricted term-rewriting system of rules, written in XML,
for transforming XML documents into other XML documents
</li>
</ul>
</p>
<h2><a name="Participants-Logos">Participants' Logos</a></h2>
<p>
The RuleML Initiative consists of <a href="http://www.dfki.de/~urban/ruleml/inlogos.html">the participants represented here by their logos</a>.
</p>
<h2><a name="Participants-Systems">Participants' Systems (Updated: 2008-07-22)</a></h2>
<table border="1" cellpadding="5" bgcolor="#CCCCFF"><tr><td>
<table border="1" cellpadding="5" bgcolor="#FFCCCC"><tr><td>
Besides on the <a href="#Related">related work</a>, the RuleML Initiative is based on
the following systems of the participants listed in parentheses:
<ol>
<li>
<a href="http://www.cs.mu.oz.au/agentlab/">Agent Frameworks</a>
(<a href="http://www.cs.mu.oz.au/~leon/">Leon Sterling</a>,
<a href="http://www.cs.mu.oz.au/">Department of Computer Science and Software Engineering, University of Melbourne</a>, Australia)
</li>
<li>
<a href="http://www.haifa.il.ibm.com/projects/software/amit/">AMIT/ADI</a>
(<a href="http://www.research.ibm.com/people/a/adi/">Asaf Adi</a>,
<a href="mailto:sommer@il.ibm.com">Ziva Sommer</a>,
<a href="http://www.haifa.il.ibm.com/">IBM Research Lab in Haifa</a>, Israel)
</li>
<li>
<a href="http://tmitwww.tm.tue.nl/staff/gwagner/AORML/">AORML</a>
(<a href="http://tmitwww.tm.tue.nl/staff/gwagner/">Gerd Wagner</a>,
<a href="http://tmitwww.tm.tue.nl/index-e.html">Faculty of Technology Management, I & T, Eindhoven University of Technology</a>, The Netherlands)
</li>
<li>
<a href="http://www.mindbox.com/solutions/products.shtml">ARTEnterprise</a>
(<a href="mailto:samir.rohatgi@mindbox.com">Samir Rohatgi</a>,
<a href="mailto:brian.sauk@mindbox.com">Brian Sauk</a>,
<a href="http://www.mindbox.com">MindBox Inc.</a>, USA)
</li>
<li>
<a href="http://www.kr.tuwien.ac.at/staff/roman/aspruleml/">ASP RuleML</a>
(<a href="http://www.kr.tuwien.ac.at/staff/roman/">Roman Schindlauer</a>,
<a href="http://www.kr.tuwien.ac.at/staff/eiter/eiter.html">Thomas Eiter</a>,
Vienna University of Technology;
<a href="http://www.mat.unical.it/~ianni/">Giovambattista Ianni</a>,
Universita' della Calabria;
Austria, Italy)
</li>
<li>
<a href="http://www.smartbot-technologies.de/botform.html">BotForm&trade</a>
(<a href="mailto:sven.seelig@smartbot-technologies.de">Sven Seelig</a>,
<a href="mailto:sml@smartbot-technologies.de">Sonja Muller Landmann</a>,
<a href="http://www.smartbot-technologies.de">Smart Bot Technologies</a>, Germany)
</li>
<li>
<a href="http://ebusiness.mit.edu/bgrosof/paps/fipa-grosof-07-00-distrib.ps">BRML/DAML-RULES</a>
(<a href="http://ebusiness.mit.edu/bgrosof/">Benjamin Grosof</a>,
<a href="http://mitsloan.mit.edu">MIT Sloan School of Management</a>, USA)
</li>
<li>
<a href="http://www.pi4soa.org">CDL</a>
(<a href="mailto:steve@pi4tech.com">Steve Ross-Talbot</a>,
<a href="http://www.pi4tech.com/">Pi4 Technologies</a>;
UK)
</li>
<li>
<a href="http://www.research.ibm.com/rules">CommonRules</a>
(<a href="mailto:hychan@us.ibm.com">Hoi Chan</a>,
<a href="http://www.research.ibm.com">IBM T.J. Watson Research</a>, USA)
</li>
<li>
<a href="http://www.informatik.uni-bremen.de/~ga/research/ruleml.html">Deimos&Phobos</a>
(<a href="http://www.ics.forth.gr/~antoniou/">Grigoris Antoniou</a>,
<a href="http://www.informatik.uni-bremen.de/">Fachbereich Mathematik & Informatik, Universität Bremen</a>, Germany)
</li>
<li>
<a href="http://lpis.csd.auth.gr/systems/dr-device.html">DR-DEVICE</a>
(<a href="http://www.csd.auth.gr/~nick">Nick Bassiliades</a>,
<a href="http://www.csd.auth.gr/~lpis">Logic Programming and Intelligent Systems (LPIS) Group</a>,
<a href="http://www.csd.auth.gr/index.en.php">Dept. of Informatics</a>,
<a href="http://www.auth.gr">Aristotle University of Thessaloniki</a>, Greece;
<a href="http://www.ics.forth.gr/~antoniou">Grigoris Antoniou</a>,
<a href="http://www.ics.forth.gr/isl/">Information Systems Laboratory</a>,
<a href="http://www.ics.forth.gr/">Institute of Computer Science</a>,
<a href="http://www.forth.gr">FORTH</a>, Heraklion, Crete, Greece)
</li>
<li>
<a href="http://www.sybase.com/detail?id=1012526">EAI Rules engine</a>
(<a href="mailto:rwhalen@sybase.com">Ruth Whalen</a>, <a href="mailto:Darren.Damato@New-Era-of-Networks.com">Darren D'Amato</a>,
<a href="http://www.sybase.com/">Sybase Database Management Systems</a>, <a href="http://www.sybase.com/neweraofnetworks">New Era Of Networks, Inc.</a>, USA)
</li>
<li>
<a href="http://www.agfa.com/w3c/euler/">Euler</a>
(<a href="http://www.agfa.com/w3c/jdroo/">Jos De Roo</a>,
<a href="http://www.agfa.com/">AGFA</a>, Belgium)
</li>
<li>
<a href="http://www.dsic.upv.es/~jorallo/flip/">FLIP</a>
(<a href="http://www.dsic.upv.es/~jorallo/">Jose Hernandez-Orallo</a>,
<a href="http://www.dsic.upv.es/">DSIC</a>, <a href="http://www.upv.es/">Politechnical University of Valencia</a>, Spain)
</li>
<li>Java Forward-Chaining Engines Integration
(<a href="mailto:ebonnet_NO_SPAM_EMAIL@genigraph.fr">Emmanuel Bonnet</a>,
<a href="mailto:gmolines@optechsoftware.com">Guilhem Molines</a>,
<a href="mailto:onicolas_NO_SPAM_EMAIL@genigraph.fr">Olivier Nicolas</a>,
<a href="http://www.genigraph.fr">Genigraph/OpTech Software</a>, France, USA)
</li>
<li>
<a href="http://flora.sourceforge.net">Flora-2</a>
(<a href="http://www.cs.sunysb.edu/~kifer">Michael Kifer</a>,
<a href="http://www.cs.sunysb.edu/~guizyang">Guizhen Yang</a>,
<a href="http://www.cs.sunysb.edu">Department of Computer Science</a>
<a href="http://www.stonybrook.edu">State University of New York at Stony Brook</a>, USA)
</li>
<li>
<a href="http://www.iit.nrc.ca/www/E_Business/Research.html">jDREW</a>
(<a href="http://www.cs.unb.ca/~bspencer">Bruce Spencer</a>,
<a href="http://www.cs.unb.ca">Faculty of Computer Science</a>,
<a href="http://www.unb.ca">University of New Brunswick</a> and
<a href="http://www.iit.nrc.ca/">Institute for Information Technology</a>,
<a href="http://www.nrc.ca/">National Research Council of Canada</a>, Canada)
</li>
<li>
<a href="http://herzberg.ca.sandia.gov/jess/">Jess</a>
(<a href="http://herzberg.ca.sandia.gov">Ernest Friedman-Hill</a>,
<a href="http://www.sandia.gov/">Distributed Systems Research, Sandia National Labs</a>, USA)
</li>
<li>KNOW: Knowledge Norm Of Webmind
(<a href="mailto:Pei.Wang@temple.edu">Pei Wang</a>,
<a href="http://www.webmind.com/">Webmind Inc.</a>, USA)
</li>
<li>
<a href="http://lispminer.vse.cz">LispMiner</a>
(<a href="http://nb.vse.cz/~svatek/welcom_e.htm">Vojtech Svatek</a>,
<a href="mailto:rauch@vse.cz">Jan Rauch</a>,
<a href="mailto:xlinv05@vse.cz">Vaclav Lin</a>,
<a href="http://nb1.vse.cz/~svatek/ke_group.htm">Knowledge Engineering Group</a>,
<a href="http://kizi2.vse.cz">Department of Information and Knowledge Engineering (DIKE)</a>,
<a href="http://www.vse.cz">University of Economics, Prague</a>, Czech Republic)
</li>
<li>
<a href="http://machine-knows.etri.re.kr/bossam/docs/logicml.html">LogicML</a>/<a href="http://machine-knows.etri.re.kr/bossam">Bossam Rule Engine</a>
(<a href="mailto:minsu@etri.re.kr">Minsu Jang</a>,
<a href="mailto:jcsohn@etri.re.kr">Joochan Sohn</a>,
<a href="http://www.etri.re.kr/e_etri/">ETRI</a>, Korea)
</li>
<li>
<a href="http://www.mandarax.org/">Mandarax</a>
(<a href="mailto:jens.dietrich@unforgettable.com">Jens Dietrich</a>,
Department of Computer Science, <a href="http://www.polytechnic.edu.na/">Polytechnic of Namibia</a>, Namibia)
</li>
<li>
<a href="http://galeb.etf.bg.ac.yu/~vm/papers/r7inen3.lo.pdf">Obelix</a>
(<a href="http://galeb.etf.bg.ac.yu/~vm">Veljko Milutinovic</a>,
<a href="mailto:sasa@galeb.etf.bg.ac.yu">Sasa Mitrovic</a>,
<a href="http://www.etf.bg.ac.yu/?lang=en">Faculty of Electrical Engineering</a>,
<a href="http://www.beograd.org.yu/english/zivot/obrnauka/univerz/">University of Belgrade</a>,
Serbia and Montenegro)
</li>
<li>
<a href="http://kmi.open.ac.uk/projects/ocml/">OCML</a>
(<a href="http://kmi.open.ac.uk/people/motta/">Enrico Motta</a>,
<a href="http://kmi.open.ac.uk/people/domingue/">John Domingue</a>,
<a href="http://kmi.open.ac.uk/home-t.cfm">Knowledge Media Institute</a>,
<a href="http://www.open.ac.uk/">The Open University</a>,
UK)
</li>
<li>
<a href="http://www.i-u.de/schools/eberhart/ontojava/">OntoJava</a>
(<a href="http://www.aifb.uni-karlsruhe.de/WBS/aeb/">Andreas Eberhart</a>,
<a href="http://www.i-u.de/">International University in Germany</a>, Germany)
</li>
<li>
<a href="http://www.inf.fu-berlin.de/inst/ag-nbi/research/owltrans/">OWLTrans</a>
(<a href="http://www.is.pku.edu.cn/~mayyam/">Jing Mei</a>,
<a href="http://www.inf.fu-berlin.de/inst/ag-nbi/">Networked Information Systems</a>,
<a href="http://www.fu-berlin.de/">Freie Universität Berlin</a>, Germany)
</li>
<li>
<a href="http://cs-www.cs.yale.edu/homes/dvm/">PDDL: Planning Domain Definition Language</a>
(<a href="http://cs-www.cs.yale.edu/homes/dvm/">Drew V. McDermott</a>,
<a href="http://www.cs.yale.edu/">Department of Computer Science, Yale University</a>, USA)
</li>
<li>
<a href="http://protege.stanford.edu">Protégé-2000</a>
(<a href="http://smi-web.stanford.edu/people/musen/">Mark Musen</a>,
<a href="http://smi-web.Stanford.EDU/">Stanford Medical Informatics</a>, USA)
</li>
<li>
<a href="http://www.prova.ws">Prova Language for Rule-based Java Scripting, Information Integration, and Agent Programming</a>
(<a href="http://www.soi.city.ac.uk/~firmata">Alex Kozlenkov</a>,
<a href="http://www.soi.city.ac.uk">School of Informatics</a>,
<a href="http://www.city.ac.uk">City University, London</a>, UK)
</li>
<li>RBML: Rule Base Markup Language
(<a href="http://www.geocities.com/Christopher.Roberts/">Chris Roberts</a>,
<a href="http://www.sun.com/">Sun Microsystems</a>, USA)
</li>
<li>
<a href="http://ibis.in.tum.de/staff/paschke/rbsla/index.htm">RBSLA: Rule-based Service Level Agreements</a>
(<a href="http://ibis.in.tum.de/staff/paschke/index.htm">Adrian Paschke</a>,
<a href="http://ibis.in.tum.de/index.htm">Internet-based Information Systems (IBIS) </a>,
<a href="http://www.in.tum.de/index_en.html">Department of Informatics, Technical University Munich</a>, Germany)
</li>
<li>
<a href="http://www.relfun.org/rfml/">RFML</a>
(<a href="http://www.cs.unb.ca/~boley/">Harold Boley</a>,
<a href="http://www.dfki.de/">DFKI</a>, Germany)
</li>
<li>
<a href="http://arabella.mcm.unisg.ch/SeCo/">SeCo</a>
(<a href="http://www.netacademy.org/netacademy/register.nsf/mcm_staff/bschmid">Beat Schmid</a>,
<a href="http://www.mcm.unisg.ch/">Institute for Media and Communications Management</a>,
University of St. Gallen, Switzerland)
</li>
<li>
<a href="http://www.damlsmm.ri.cmu.edu">Semantic Matchmaker</a>
(<a href="http://www-2.cs.cmu.edu/%7Esycara/">Katia Sycara</a>,
<a href="http://www-2.cs.cmu.edu/~softagents/atlas/homepages/paolucci_massimo.html">Massimo Paolucci</a>,
<a href="http://www-2.cs.cmu.edu/~softagents">The Intelligent Software Agents Lab</a>,
<a href="http://www.ri.cmu.edu">The Robotics Institute</a>,
<a href="http://www.cs.cmu.edu">School of Computer Science</a>,
<a href="http://www.cmu.edu">Carnegie Mellon University</a>, USA)
</li>
<li>
<a href="http://www.dfki.uni-kl.de/frodo/triple/">TRIPLE</a>
(<a href="http://www.stefandecker.org/">Stefan Decker</a>,
<a href="http://www.deri.ie/">Digital Enterprise Research Institute</a>;
<a href="http://www.dfki.uni-kl.de/~sintek/">Michael Sintek</a>,
<a href="http://www.dfki.de/">DFKI</a>;
Germany, Ireland)
</li>
<li>
<a href="http://www.ida.liu.se/~pawpi/research.html">Type-Based Diagnoser</a>
(<a href="http://www.ida.liu.se/~janma/">Jan Maluszynski</a>,
<a href="http://www.ida.liu.se/sweb/">Swedish Semantic Web Initiative</a>,
<a href="http://www.ida.liu.se/index.en.shtml">Department of Computer and Information Science</a>,
<a href="http://www.lith.liu.se/en/index.html">Linköping University</a>,
Sweden)
</li>
<li>
<a href="http://home.comcast.net/~stabet/urml.html">URML</a>
(<a href="mailto:david_ash99@yahoo.com">David Ash</a>,
<a href="http://www.realtimeagentsinc.com">Real Time Agents Inc.</a>;
<a href="mailto:prabhakar_bhogaraju@yahoo.com">Prabhakar Bhogaraju</a>,
<a href="http://www.mindbox.com/">MindBox</a>;
<a href="http://home.comcast.net/~stabet/">Said Tabet</a>,
<a href="http://www.macgregor.com/">Macgregor Inc.</a>;
USA)
</li>
<li>Versata Logic Suite for Transaction Logic
(<a href="mailto:James_Liddle@Versata.com">James Liddle</a>,
<a href="mailto:Kamran_Yousaf@Versata.com">Kamran Yousaf</a>,
<a href="HTTP://WWW.Versata.com">Versata</a>;
UK)
</li>
<li>
<a href="http://www.soi.city.ac.uk/~msch/cgi/viva/">Vivid Agents</a>/<a href="http://www.soi.city.ac.uk/~msch/revise/revise.html">Revise</a>
(<a href="http://www.soi.city.ac.uk/~msch/">Michael Schroeder</a>,
<a href="http://www.soi.city.ac.uk/">The School of Informatics</a>,
<a href="http://www.city.ac.uk/">City University London</a>,
UK)
</li>
<li>VPP
(<a href="mailto:randerson@macgregor.ws">Rand Anderson</a>,
<a href="http://www.macgregor.ws">Macgregor</a>, USA)
</li>
<li>
<a href="http://centria.di.fct.unl.pt/~cd/projectos/w4/index.htm">W4</a>
(<a href="http://centria.di.fct.unl.pt/~cd">Carlos Viegas Damásio</a>,
<a href="http://centria.di.fct.unl.pt/">CENTRIA (Centro de Inteligência Artificial da
Universidade Nova de Lisboa)</a>, Portugal)
</li>
<li>
<a href="http://www.xcerpt.org">Xcerpt</a>
(<a href="http://www.pms.informatik.uni-muenchen.de/mitarbeiter/bry/">François Bry</a>,
<a href="http://www.wastl.net/">Sebastian Schaffert</a>,
<a href="http://www.pms.informatik.uni-muenchen.de/index-e.html">Teaching and Research Unit Programming and Modelling Language</a>,
<a href="http://www.informatik.uni-muenchen.de/index-e.html">Institute of Computer Science, Ludwig-Maximilians-Universität München</a>, Germany)
</li>
<li>
<a href="http://kr.cs.ait.ac.th/xet/">XET</a>/<a href="http://kr.cs.ait.ac.th/XDD/">XDD</a>
(<a href="mailto:vw@cs.ait.ac.th">Vilas Wuwongse</a>,
<a href="mailto:ca@cs.ait.ac.th">Chutiporn Anutariya</a>,
<a href="http://kr.cs.ait.ac.th/">Knowledge Representation Laboratory</a>,
<a href="http://www.ait.ac.th/">Asian Institute of Technology</a>, Thailand)
</li>
<li>
<a href="http://xrml.kaist.ac.kr">XRML</a>
(<a href="http://iis.kaist.ac.kr/~jklee/">Jae Kyu Lee</a>,
<a href="http://icec.net/">ICEC</a>,
<a href="http://iis.kaist.ac.kr/">KAIST</a>, Korea)
</li>
</ol>
</td></tr></table>
</td></tr></table>
<p>
2001-05-11:
"RuleML, the emerging standards effort on XML Rules knowledge
representation, continues to progress in its design -- and also in its
acceptance; notably, IBM this past month joined as participant and publicly
disclosed that it is prototyping support for RuleML. Presentation
materials from two recent W3C meetings, and a new short overview conference
paper, are now available: see <a href="http://ebusiness.mit.edu/bgrosof/#XMLRules">http://ebusiness.mit.edu/bgrosof/#XMLRules</a>."
(Also see: <a href="http://www.alphaworks.ibm.com/tech/commonrules">alphaWorks Posting</a>. Contact: <a href="mailto:hychan@us.ibm.com">Hoi Chan</a>.)
</p>
<h2><a name="Steps">Initial Steps</a></h2>
<p>
Some
<a href="insteps.html">initial steps taken by the RuleML Initiative</a>
have been
to structure the area of rule markup,
to raise issues and identify tasks, and
to propose tentative rule tags/attributes.
</p>
<h2><a name="Design">Design</a></h2>
<p>
The
<a href="indesign.html">current RuleML design</a>
shows the big picture of how we conceive and formalize rule markup;
this has been the basis of much of our more specific work.
</p>
<h2><a name="Specification">Specification</a></h2>
<p>
2001-01-31: A preliminary RuleML DTD has been released:
<a href="indtd.html">RuleML DTD Version 0.7</a>.
</p>
<p>
2001-07-11: A revised DTD version has been finalized:
<a href="indtd0.8.html">RuleML DTD Version 0.8</a>.
</p>
<p>
2001-09-25: A preliminary XML Schema for a Datalog subset of RuleML has been released:
<a href="inxsd0.8.html">RuleML Schema Version 0.8</a>.
</p>
<p>
2002-04-02: A query DTD version has been realized (cf. <a href="#Queries">Queries</a>):
<a href="indtd0.8.html">RuleML DTD Version 0.8</a>.
</p>
<p>
2004-01-28: A revised DTD/XSD version has been released:
<a href="0.85/">RuleML Version 0.85</a>.
</p>
<p>
2004-07-15: A stable XSD version has been released:
<a href="0.86/">RuleML Version 0.86</a>.
</p>
<p>
2004-08-12: A new XSD version has been released:
<a href="0.87/">RuleML Version 0.87</a>.
</p>
<p>
2004-11-02: A monolithic DTD version of FOL RuleML 0.9 has been released:
<a href="http://www.ruleml.org/fol/">FOL RuleML Version 0.9</a>.
</p>
<p>
2005-03-01: A new XSD version has been released: <a href="0.88/">RuleML Version 0.88</a>.
</p>
<p>
2005-05-27: A new XSD version has been released: <a href="0.89/">RuleML Version 0.89</a>.
</p>
<p>
2005-11-09: A new XSD version has been released: <a href="0.9/">RuleML Version 0.9</a>.
</p>
<p>
2006-08-24: A new XSD version has been released: <b><a href="0.91/">RuleML Version 0.91</a></b>.
</p>
<p>
2010-08-15: A preliminary new XSD version is being developed: <b><a href="1.0/">RuleML Version 1.0</a></b>.
</p>
<h2><a name="Queries">Queries</a></h2>
<p>
As in many deduction approaches, RuleML queries are regarded as headless implications,
symmetrically to regarding facts as bodiless
implications. They enumerate the bindings of all their free (existentially interpreted) variables.
</p>
<p>
Queries were added to RuleML 0.8 as a third top-level element of rulebases besides facts and imps
(since this extension is purely additive, all queriless RuleML 0.8 rulebases should still validate).
This gives us "for free" all refinements of RuleML's existing system of sublanguages via the _body
role of queries:
because of RuleML's DTD inheritance, additions were only required for
<a href="http://www.ruleml.org/dtd/0.8/ruleml-datalog.dtd">ruleml-datalog.dtd</a>
(<a href="http://www.ruleml.org/dtd/0.8/ruleml-datalog.dtd.txt">ruleml-datalog.dtd.txt</a>)
and
<a href="http://www.ruleml.org/dtd/0.8/ruleml-urcbindatagroundfact.dtd">urcbindatagroundfact.dtd</a>
(<a href="http://www.ruleml.org/dtd/0.8/ruleml-urcbindatagroundfact.dtd.txt">urcbindatagroundfact.dtd.txt</a>).
In particular,
<a href="http://www.ruleml.org/dtd/0.8/ruleml-datalog.dtd">ruleml-datalog.dtd</a>'s
query-extended rulebase definition is inherited by
<a href="http://www.ruleml.org/dtd/0.8/ruleml-hornlog.dtd">ruleml-hornlog.dtd</a>,
where queries in datalog use only inds and vars but queries in hornlog automatically also permit cterms
(because hornlog atoms permit cterms).
</p>
<p>
RuleML queries are illustrated by our business-rule example
<a href="http://www.ruleml.org/exa/0.8/discount.ruleml">discount.ruleml</a>
(<a href="http://www.ruleml.org/exa/0.8/discount.ruleml.txt">discount.ruleml.txt</a>)
and by
<a href="http://www.w3.org/People/Eric/">Eric Prud'hommeaux</a>'s
<a href="http://www.w3.org/2001/11/13-RDF-Query-Rules/">RDF Query example</a>
<a href="http://www.ruleml.org/exa/0.8/wsdl-rdf-query.ruleml">wsdl-rdf-query.ruleml</a>
(<a href="http://www.ruleml.org/exa/0.8/wsdl-rdf-query.ruleml.txt">wsdl-rdf-query.ruleml.txt</a>).
</p>
<p>
This query incorporation into RuleML assumes that the sublanguage expressiveness
should be the same for 'assertions' (facts and imps) and for the 'requests' (queries) on them.
So, it cannot, e.g., express queries on ground triples
(containing no variables) via non-ground triples (containing variables):
<a href="http://www.ruleml.org/exa/0.8/creator.ruleml">creator.ruleml</a>
(<a href="http://www.ruleml.org/exa/0.8/creator.ruleml.txt">creator.ruleml.txt</a>).
However, users can still employ one rulebase (module) with its DTD for 'assertions',
and another rulebase (module) with a different DTD for 'requests'.
</p>
<h2><a name="OO">Object-Oriented RuleML</a></h2>
<p>
Via <a href="indoo">Object-Oriented RuleML (OO RuleML)</a> frame-like knowledge representation
with facts (instances) and rules (methods) is now directly supported.
</p>
<h2><a name="ASP">ASP RuleML (Updated: 2006-04-06)</a></h2>
<p>
<a href="http://www.kr.tuwien.ac.at/staff/roman/ruleml/">ASP RuleML</a> defines a sublanguage of RuleML for answer-set programs in
XML Schema. This variant facilitates the specification of a number of
ASP-related constructs in a general manner. Moreover, it constitutes a
base language for specific ASP extensions, such as HEX-programs.
</p>
<h2><a name="RIF">RIF (Initiated: 2010-08-14)</a></h2>
<p>
RIF RuleML specifications are being collected here:
<ul>
<li>
<a href="http://ruleml.org/rif/RIF-CASPD.html">RIF-CASPD</a>
</li>
<li>
<a href="http://ruleml.org/rif/RIF-CLPWD.html">RIF-CLPWD</a>
</li>
</ul>
</p>
<h2><a name="RDF">RDF</a></h2>
<p>
An experimental RDF translator for a subset of RuleML 0.7 is available in XSLT:
<a href="http://www.ruleml.org/inrdf.html">RuleML in RDF Version 0.2</a>.
RuleML 0.8 now stands in the direct <a href="http://www.ruleml.org/0.8/#Context">Context</a>
of RDF.
</p>
<p>
2001-06-20: <a href="http://www.dfki.uni-kl.de/~sintek/">Michael Sintek</a> has implemented
a (Java) parser for an RDF version of the Horn-logic subset of RuleML 0.8;
it reflects an RDF RuleML syntax
by (Java) classes that currently generate textual Horn clauses but could be adapted for generating
the XML RuleML syntax:
<a href="http://www.dfki.uni-kl.de/frodo/rdf2java/">The FRODO rdf2java Tool</a>.
A converse translator from XML RuleML 0.8 to RDF RuleML 0.8 should be easier to write in XSLT
than was possible for the above-linked RuleML 0.7 translator.
</p>
<h2><a name="Lite">RuleML Lite</a></h2>
<p>
<a href="http://www.daml.org/listarchive/joint-committee/1490.html">RuleML Lite</a> has been developed basically
as a RuleML subset compatible with RDF and OWL-DL that covers webized unary and binary Datalog facts, rules, and queries.
The RuleML Lite design has interacted with the <a href="http://www.daml.org/2003/11/swrl/">SWRL</a> design via
the <a href="http://www.daml.org/committee/">Joint Committee</a>.
</p>
<h2><a name="FOL">FOL RuleML</a></h2>
<p>
The <a href="http://www.ruleml.org/fol/">FOL RuleML</a> language has been developed in interaction between
the <a href="#Structure">RuleML Steering Committee</a> and the <a href="http://www.daml.org/committee/">Joint Committee</a>,
with input from <a href="http://philebus.tamu.edu/mailman/listinfo/scl">Simplified Common Logic (SCL)</a>.
FOL RuleML shares/reuses most of the earlier RuleML LP syntax,
incorporating First-Order-Logic quantifiers and disjunctions as well as equivalence and negation.
FOL RuleML strives for a strict separation of declarative content from procedural (Assert, Query) performatives,
as pioneered by KQML.
This and further changes to the current <a href="http://www.ruleml.org/0.87/">RuleML 0.87</a>
will also benefit other sublanguages towards RuleML 0.9, in particular the Horn logic subset.
FOL RuleML is the rule component of <a href="http://www.daml.org/2004/11/fol/">SWRL FOL</a>
and a proposed FOL content language for <a href="http://www.swsi.org/">SWSI</a>.
It can be viewed as a generalization of SWRL FOL
in that it is an XML form of full FOL, with n-ary relations (predicate symbols) and
constructors (logical function symbols).
</p>
<p>
2004-11-02: <a href="http://www.ruleml.org/fol/">FOL RuleML 0.9</a> has been released,
using a <a href="http://www.ruleml.org/fol/#SynSem">monolithic DTD specification</a>.
</p>
<p>
2004-11-14: An <a href="http://lists.w3.org/Archives/Public/www-rdf-rules/2004Nov/0008.html">FOL RuleML announcement</a> has been sent.
</p>
<h2><a name="Induction">Induction</a></h2>
<p>
The FLIP Group uses RuleML in machine learning:
<a href="http://www.dsic.upv.es/~flip/RuleML/">About using RuleML for expressing machine learning knowledge</a>.
In the <a href="http://lispminer.vse.cz">LispMiner</a> project
work with RuleML is directed towards statistical association rules.
</p>
<h2><a name="Translators">Translators</a></h2>
<p>
Since RuleML should help rule-system interoperation,
(XSLT, ...) translators for RuleML rulebases are rather important. Please send us further translator
pairs between your system and RuleML -- even if your translators are (still)
partial.
</p>
<p>
In February 2001 <a href="http://www.daml.org/people/mdean/">Mike Dean</a> created the first operational RuleML rulebase,
<a href="http://www.daml.org/2001/02/gedcom-ruleml/">GEDCOM</a>,
with rules on family relationships (child, spouse, etc.) run via XSLT translators to the XSB, JESS, and n3/cwm engines.
</p>
<p>
2001-09-17: <a href="http://www.cs.unb.ca/~boley/">Harold Boley</a>
has specified <a href="http://www.relfun.org/ruleml/rfml-ruleml.html">XSLT translators between the Horn-logic subsets of RuleML and RFML</a>.
These can make implementations of both systems available to each other and
permit, e.g., a preliminary HTML rendering of RuleML rulebases.
The XSLT stylesheets may also serve as blueprints for specifying further translators
to/fro RuleML.
</p>
<p>
2001-09-19: <a href="http://www.aifb.uni-karlsruhe.de/WBS/aeb/">Andreas Eberhart</a>
implemented an alpha version of <a href="http://www.i-u.de/schools/eberhart/ontojava/">OntoJava</a>.
The basic idea is to automatically map Protégé ontologies, instances defined
in them, and RuleML rules into a sinlge Java main memory DB / rule engine
that can then be used as the basis of an application.
He is looking forward to hearing of your ideas and input.
</p>
<p>
2002-02-04: <a href="http://www.aifb.uni-karlsruhe.de/WBS/aeb/">Andreas Eberhart</a>
extended <a href="http://www.i-u.de/schools/eberhart/ontojava/">OntoJava</a>
by reaction rules:
<b><pre>
<java>
runtime.Loader.load("http://localhost:8080/servlet/SearchGate?flight="
+ <var>F</var>.name, false);
</java></pre></b>
This example loads RDF info into the DB, which comes from a kind of Web Service.
So emails can be sent as well, etc.
While this is not 'cross-platform', it should be interessting from an engineering
point of view.
</p>
<p>
2002-07-08: <a href="mailto:stabet@ruleml.org">Said Tabet</a> created an
<a href="http://www.ruleml.org/jess/RuleMLTransform.xsl">XSLT stylesheet</a>
for transforming from a version of RuleML to Jess.
The full Java environment for running this is available from
<a href="mailto:stabet@ruleml.org">Said Tabet</a>.
</p>
<p>
2003-08-26: Stephen Greene has specified
<a href="http://www.ruleml.org/ooruleml-xslt/oo2prml.html">XSLT translators between Positional and Object-Oriented RuleML</a>.</p>
<p>
2004-08-12: David Hirtle has created an
<a href="http://www.ruleml.org/0.87/#XSLT">XSLT translator between RuleML 0.86 and 0.87</a> as part of the
0.87 release.</p>
<p>
2005-03-01: David Hirtle has created an
<a href="http://www.ruleml.org/0.88/#XSLT-Based%20Upgrader">XSLT "upgrader"</a> to translate between RuleML 0.87 and 0.88 as part of the
0.88 release. An <a href="http://www.ruleml.org/0.88/#XSLT-Based%20Normalizer">XSLT "normalizer"</a> for reconstructing all skipped role tags to achieve a fully-expanded, normal form is also included with this release.</p>
<p>
2005-05-27: The
<a href="http://www.ruleml.org/0.89/#XSLT-Based%20Upgrader">XSLT "upgrader" from 0.88 to 0.89</a> has been created as part of the
0.89 release. An <a href="http://www.ruleml.org/0.89/#XSLT-Based%20Normalizer">updated XSLT "normalizer"</a> for achieving a normal form is also included.</p>
<p>2005-09-13: Jie Li has updated an earlier translator from RFML to RuleML <a href="http://www.ruleml.org/usecases/chemxelem/#XSLT%20Stylesheet">as part of the ChemXelem use case</a>.</p>
<h2><a name="Engines">Engines (Updated: 2008-06-30)</a></h2>
<p>
One or more rule engines will be needed for executing RuleML rulebases.
On 2000-11-15, the RuleML Initiative thus joined forces with the
Java Specification Request <a href="http://java.sun.com/aboutJava/communityprocess/jsr/jsr_094_ruleengine.html">JSR-000094 Java Rule Engine API</a>.
This cooperation will enable a direct cross-fertilization between the
complementary specifications of the open XML-based Rule Markup Language
and of the Java runtime API for rule engines.
</p>
<p>
2001-06-04: <a href="mailto:jens.dietrich@unforgettable.com">Jens Dietrich</a>
implemented the first complete input-processing-output environment for RuleML.
To download the api (source code) click
<a href="http://www.mandarax.org/downloads.html">Mandarax RuleML</a>.
Any feedback is welcome! If you have problems, don't hesitate to contact Jens
for assistance.
</p>
<p>
2002-03-08: <a href="mailto:jens.dietrich@unforgettable.com">Jens Dietrich</a>
has finally published <a href="http://www.mandarax.org/downloads.html">Mandarax 1.6</a>
with major improvements, including new docs and all the features discussed in the
<a href="http://www.mandarax.org/docs/dagstuhl.pdf">Mandarax Dagstuhl Talk</a>.
One of the new packages is
<a href="http://www.mandarax.org/downloads/xkb_b1.jar">xkb_b1.jar</a>
-- it contains
a modular driver to translate rule bases to XML and vice versa. I.e., there
are tiny
adapter objects responsible for exporting/importing rules, facts, terms
etc.
This should enable us to set up a reference application for any new standard
in hours.
</p>
<p>
2001-06-26: <a href="http://www.dfki.uni-kl.de/~sintek/">Michael Sintek</a>
has implemented a small XSB-based engine that can also be looked at as
the first RuleML querying <i>agent</i>.
It's a servlet (running in Tomcat) that receives RuleML rulebases in