язык запросов sparql

Protégé-OWL has an experimental assertion mechanism that allows you to declare whether a given statement

The trivial example above also illustrates that queries can in principle be used for constraint checking.

will use xsd:int and xsd:float. As a result, you may need to add the datatype explicitly to match with the query.

such as "42" or "4.2" with xsd:integer and xsd:double, while most Protégé-OWL ontologies

Note: You may need to take extra care when working with XML Schema datatypes, because SPARQL maps literals

by Leigh Dodds that is available on the website.

The RDF representation of the periodic table and the example SPARQL query shown above are accessible as part of

ordered by name. Double-clicking on a result entry will navigate to the particular individual in the Individuals

atomic number, and optionally the color of all the elements in the periodic table. Additionally, the results will be

query results will be shown on the right-hand side. In the example above, the query selects the name, symbol,

In the Query panel on the left, you can enter your query in the SPARQL syntax, press the Execute Query button, and the

click on the OWL -> Open SPARQL Query panel... menu item. This will open a panel at the bottom of the screen.

To use SPARQL in Protégé-OWL, you need version 3.2 or above. After launching Protégé,

Please refer to the SPARQL specification for examples.

SPARQL can be used to query an RDF Schema or OWL model to filter out individuals with specific characteristics.

towards a standard query language for the Semantic Web. Its focus is on querying RDF graphs at the triple level.

is a W3C Candidate Recommendation

 using the sparql query engine with protégé-owl

     

Protégé: Using SPARQL in Protégé-OWL