What is SPARQL endpoint?

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.

Can a SPARQL endpoint be used by applications as well?

In chapter 3 we looked at other ways in which Linked Data can be made available in order to be consumed by an application. As well as providing a SPARQL endpoint, RDF data can be accessed by dereferencing HTTP URIs, parsing RFDa or reading an RDF dump.

What is DBpedia SPARQL?

DBpedia is a community project that creates and provides public access to critical structured data for what’s commonly referred to as the Linked Open Data Cloud.

What does SPARQL stand for?

SPARQL Protocol and RDF Query Language
SPARQL is a recursive acronym, which stands for SPARQL Protocol and RDF Query Language. SPARQL consists of two parts: query language and protocol. The query part of that is pretty straightforward. SQL is used to query relational data. XQuery is used to query XML data.

What is the difference between SPARQL and SQL?

In considering the differences, it is important to keep in mind that SPARQL is designed to query RDF data while SQL is designed to query relational data. As such, both languages and their respective advantages closely reflect the data models they work with.

Where 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.

How do I query RDF using SPARQL?

2.5 Building RDF Graphs SPARQL has several query forms. The SELECT query form returns variable bindings. The CONSTRUCT query form returns an RDF graph. The graph is built based on a template which is used to generate RDF triples based on the results of matching the graph pattern of the query.

Why is SPARQL used?

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.

What can you do with SPARQL?

Is SPARQL like SQL?

Both of these languages give the user access to create, combine, and consume structured data. SQL does this by accessing tables in relational databases, and SPARQL does this by accessing a web of Linked Data.

Where should I run SPARQL query?

Executing the query

1. Windows setup. Execute: bat\sparql.bat –data=doc\Tutorial\vc-db-1.rdf –query=doc\Tutorial\q1.rq.
2. bash scripts for Linux/Cygwin/Unix. Execute: bin/sparql –data=doc/Tutorial/vc-db-1.rdf –query=doc/Tutorial/q1.rq.
3. Using the Java command line applications directly. (This is not necessary.)

How do you create a SPARQL query using Triple Data?

The basic building block for SPARQL queries is triple patterns. A triple pattern is just like an RDF graph triple, but you can use a variable in any one of the three positions. We use triple patterns to find the matching triples in a graph and variables act like wildcards that match any node.

What is virtuoso SPARQL endpoint?

An integral component of the LOD Cloud, Virtuoso lets anyone experience the full power and sophistication of a SPARQL endpoint (for local or federated use) by simply downloading a few files: What is a Virtuoso SPARQL Endpoint, and why is it important?

Is there a service to monitor the availability of SPARQL endpoints?

In addition to the list below, Mondeca provides a SPARQL endpoint uptime service which monitors the availability of all SPARQL endpoints that are cataloged in CKAN. A similar service is provided by Vienna University. (alphabetical. let’s avoid PoorMansHypertext and in-your-face URIs, please)

What is the SPARQL endpoint in dbtune?

This endpoint contains data that is also contained in some of the other SPARQL endpoints in this list (such as Neurocommons, LinkedCT, Drugbank etc.). dbtune aims to gather and interlink music-related information.

What is the SPARQL Protocol?

The SPARQL Protocol is an HTTP-based protocol for performing SPARQL operations against data via SPARQL Endpoints. Subject to the kind of operation being performed, HTTP payloads are dispatched using GET, POST, or PATCH methods.

https://www.youtube.com/watch?v=w_pJ3XiBWeM