TopBraid Composer is a professional development environment for W3C's Semantic Web standards RDF Schema, the OWL Web Ontology Language, the SPARQL Query Language and the Semantic Web Rule Language (SWRL). Composer can be used to edit RDFS/OWL files in various formats, and also provides scalable database backends (Jena, AllegroGraph, Oracle 11g and Sesame) as well as multi-user support.

Composer provides a comprehensive set of features to cover the whole life cycle of semantic application development. In addition to being a complete ontology editor with refactoring support, Composer also can be used as a run-time environment to execute rules, queries, reasoners and mash-ups. Based on Eclipse, Composer can also be extended with custom Java plug-ins. This supports the rapid development of semantic applications in a single platform.

Standard Edition Features

• UML-like Class Diagrams
  
  
• Classification and Consistency Checking
  
  
• Rules
  
  
• SPARQL Queries
  
  
• Data Source Mapping
  
  
• Geography and Location Mapping
  
  
• Calendar and Chart Mash-Ups
  
  
• Semantic Web and Mash-Up development with RDFa and GRDDL
  
  
• Visual RDF Graphs
  
  
• Multi-User Support
  
  
• Ontology-Driven Forms
  
  
• Form Customization
  
  
• Source Code Editing
  
  
• Imports and Namespace Management
  
  
• Import of Databases, UML, XML Schema and Spreadsheets
  
  
• HTML Documentation Generation