R2ML

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title: "R2ML" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["rule-engines", "xml-markup-languages", "knowledge-representation-languages"] topic_path: "linguistics" source: "https://en.wikipedia.org/wiki/R2ML" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

The REWERSE Rule Markup Language (R2ML) is developed by the REWERSE Working Group I1 for the purpose of rules interchange between different systems and tools.

Scope

• An XML based rule language;
• Support for: integrity rules, derivation rules, production rules and reaction rules;
• Integrate functional languages (such as OCL) with Datalog languages (such as SWRL);
• Serialization and interchange of rules by specific software tools;
• Integrating rule reasoning with actual server side technologies;
• Deploying, publishing and communicating rules in a network.

Design principles

• Modeled using MDA;
• Rule concepts defined with the help of MOF/UML;
• Required to accommodate:
  • Web naming concepts, such as URIs and XML namespaces;
  • The ontological distinction between objects and data values;
  • The datatype concepts of RDF and user-defined datatypes;
• Actions (following OMG PRR submission);
• Events;
• EBNF abstract syntax;
• XML based concrete syntax validated by an XML Schema;
• Allowing different semantics for rules.

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