D2RQ is a declarative language to describe mappings between relational database schemata and OWL/RDFS ontologies. The D2RQ Platform uses these mapping to enables applications to access a RDF-view on a non-RDF database through the Jena and Sesame APIs, as well as over the Web via the SPARQL Protocol and as Linked Data.
This tool is intended to browse the SUMO ontology (Suggested Upper Merged Ontology). SUMO is a starter document in the IEEE Standard Upper Ontology effort. For more information, please see http://www.ontologyportal.org or http://suo.ieee.org.
Microformats are small formatting pieces designed to make your data easier to read by both users and software. Although their use is not widespread, it's important that every web developer becomes familiar with them, as they're sure to be an integral part of the web's future. Because of this, there are a number of articles and resources out there devoted to microformats. We've compiled more than 100 of the best here.