RDF query language

An RDF query language is a computer language, specifically a query language for databases, able to retrieve and manipulate data stored in Resource Description Framework format.

SPARQL is emerging as the de facto RDF query language, and is a W3C recommendation.^[1] Released as a Candidate Recommendation in April 2006, it returned to Working Draft status in October 2006, due to open issues. It returned to Candidate Recommendation status in June 2007.^[2] On 12 November 2007 the status of SPARQL changed into Proposed Recommendation.^[3] On 15 January 2008, SPARQL was standardized.^[4]

Other RDF query languages

• DQL, XML-based, queries and results expressed in DAML+OIL
• N3QL, based on Notation 3
• R-DEVICE
• RDFQ, XML-based
• RDQ, SQL-like
• RDQL, SQL-like
• RQL/RVL, SQL-like
• SeRQL, SQL-like, similar to RQL/RVL
• Versa (query language), compact syntax (non–SQL-like), solely implemented in 4Suite (Python)
• XUL has a template element in which to declare rules for matching data in RDF. XUL uses RDF extensively for databinding.
• Adenine (programming language written in RDF).

External links

• RDF Query specification
• RDF query language survey
  • A Comparison of (some) RDF Query Languages
• RDF query use cases, including query language samples
• SparQL

References

1. Prud'hommeaux, Eric; Seaborne, Andy (15 January 2008). "SPARQL Query Language for RDF". W3C. World Wide Web Consortium.
2. Herman, Ivan (15 June 2007). "SPARQL is a Candidate Recommendation". Semantic Web Activity News. World Wide Web Consortium.
3. "Three SPARQL Proposed Recommendations: SPARQL Query Language for RDF; Query Results XML Format; Protocol for RDF". W3C News in 2007. World Wide Web Consortium. 13 November 2007.
4. Herman, Ivan (15 January 2008). "SPARQL is a Recommendation". Semantic Web Activity News. World Wide Web Consortium.