What is SPARQL used for?
SPARQL, short for “SPARQL Protocol and RDF Query Language”, enables users to query information from databases or any data source that can be mapped to RDF. The SPARQL standard is designed and endorsed by the W3C and helps users and developers focus on what they would like to know instead of how a database is organized.
Is SPARQL an API?
A SPARQL Query Service is an HTTP Service (also known as a Web Service) that offers an API for performing declarative Data Definition and Data Manipulation operations on data represented as RDF sentence collections.
Is SPARQL a NoSQL?
It’s not the first time that the industry has considered common database query languages for NoSQL (see this story at our sister site Dataversity.net for some perspective on that). A factor in SPARQL’s favor is query portability across NoSQL systems.
Is SPARQL a programming language?
SPARQL (pronounced “sparkle” /ˈspɑːkəl/, a recursive acronym for SPARQL Protocol and RDF Query Language) is an RDF query language—that is, a semantic query language for databases—able to retrieve and manipulate data stored in Resource Description Framework (RDF) format.
What is a Sparql server?
What is a SPARQL Query Service? A SPARQL Query Service is an HTTP Service (also known as a Web Service) that offers an API for performing declarative Data Definition and Data Manipulation operations on data represented as RDF sentence collections.
How do you write queries in Sparql?
A SPARQL query comprises, in order:
- Prefix declarations, for abbreviating URIs.
- Dataset definition, stating what RDF graph(s) are being queried.
- A result clause, identifying what information to return from the query.
- The query pattern, specifying what to query for in the underlying dataset.
What do you need to know about SPARQL 1.1?
SPARQL 1.1 Protocol for RDF – A protocol defining means for conveying arbitrary SPARQL queries and update requests to a SPARQL service. SPARQL 1.1 Service Description – A specification defining a method for discovering and a vocabulary for describing SPARQL services. SPARQL 1.1 Graph Store HTTP Protocol – As opposed to the full SPARQL protocol,
How does SPARQL 1.1 update work in RDF?
W3C liability, trademark and document use rules apply. This document describes SPARQL 1.1 Update, an update language for RDF graphs. It uses a syntax derived from the SPARQL Query Language for RDF. Update operations are performed on a collection of graphs in a Graph Store.
How does the SPARQL 1.1 graph store update?
The SPARQL 1.1 Graph Store HTTP Protocol specification employs the HTTP protocol to perform update operations using standard HTTP methods, such as PUT and DELETE. While providing a simple and well known API, it is necessarily restricted in its operations due to the limited set of methods in the HTTP protocol.
How is SPARQL 1.1 update different from other update languages?
In contrast, SPARQL 1.1 Update permits multiple modifications in a single operation, and can use complex SPARQL queries for constructing data to be inserted, or choosing data to be deleted. Also, the use of an update language facilitates operations over proprietary APIs and connections that may not involve HTTP.