What is a property path?

A property path is a possible route through a graph between two graph nodes. A trivial case is a property path of length exactly 1, which is a triple pattern. Property paths allow for more concise expression of some SPARQL basic graph patterns and also add the ability to match arbitrary length paths.

What is optional SPARQL?

OPTIONAL is a binary operator that combines two graph patterns. The optional pattern is any group pattern and may involve any SPARQL pattern types. If the group matches, the solution is extended, if not, the original solution is given (q-opt3.

What can you do with SPARQL?

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 is RDF data model?

The Resource Description Framework, more commonly known as RDF, is a graph data model that formally describes the semantics, or meaning of information. It also represents metadata, that is, data about data. The parts of a triple, the subject, predicate, and object, represent links in a graph.

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 also supports extensible value testing and constraining queries by source RDF graph. The results of SPARQL queries can be results sets or RDF graphs.

What is the difference between SQL and SPARQL?

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.