Is SPARQL used?
SPARQL can be used to express queries across diverse data sources, whether the data is stored natively as RDF or viewed as RDF via middleware. SPARQL contains capabilities for querying required and optional graph patterns along with their conjunctions and disjunctions.
Who created SPARQL?
W3C
On 15 January 2008, SPARQL 1.0 was acknowledged by W3C as an official recommendation, and SPARQL 1.1 in March, 2013….SPARQL.
| Paradigm | Query language |
| Developer | W3C |
| First appeared | 2008 |
| Stable release | 1.1 / 21 March 2013 |
| Major implementations |
|---|
Is SPARQL a programming language?
SPARQL allows for a query to consist of triple patterns, conjunctions, disjunctions, and optional patterns. Implementations for multiple programming languages exist….SPARQL.
| Developer | W3C |
| First appeared | 2008 |
| Stable release | 1.1 / 21 March 2013 |
| Website | www.w3.org/TR/sparql11-query/ |
| Major implementations |
|---|
What are SPARQL endpoints?
A SPARQL Endpoint is a Point of Presence on an HTTP network that’s capable of receiving and processing SPARQL Protocol requests. It is identified by a URL commonly referred to as a SPARQL Endpoint URL.
What is the use of delete in SPARQL?
DELETE Usage examples queries which you can run against any SPARQL endpoint that supports SPARQL 1.1 and the ability to allow a verified user perform INSERT/DELETE operations. Note: There should be either DELETE WHERE OR DELETE DATA but not both DATA and WHERE in same sequence. Why? Using DELETE to manage graphs data. How?
How do I create an RDF graph using a SPARQL query?
To write the SPARQL query that creates an RDF graph, perform these steps: First, define prefixes to URIs with the PREFIX keyword. In the example below, we set bedrock as the default namespace for the query. Next, use INSERT DATA to signify you want to insert statements. Write the subject predicate object statements. Finally, execute this query:
What SPARQL version does virtuoso delete support?
This guide contains Virtuoso SPARQL 1.1. DELETE Usage examples queries which you can run against any SPARQL endpoint that supports SPARQL 1.1 and the ability to allow a verified user perform INSERT/DELETE operations. Note: There should be either DELETE WHERE OR DELETE DATA but not both DATA and WHERE in same sequence.
Why does the SPARQL/Update service generate an error when a graph exists?
The SPARQL/Update service generates an error if the graph referred by the URI already exists unless the keyword SILENT is present when no error is generated and execution of the sequence of SPARQL/Update operations continues. This operation removes the specified named graph from the Graph Store associated with the SPARQL/Update service endpoint.