RDF & SPAQL

출처 : http://www.w3.org/TR/rdf-concepts/

The Resource Description Framework (RDF) is a framework for representing information in the Web.

The underlying structure of any expression in RDF is a collection of triples, each consisting of a subject, a predicate and an object. A set of such triples is called an RDF graph.

• a subject, 
• an object, and 
• a predicate (also called a property) that denotes a relationship. 

RDF 예

<http://reqs.com/req/1234>   rdf:type                oslc_rm:Requirement

<http://reqs.com/req/1234>   dcterms:title           "Smooth upgrade path"

<http://reqs.com/req/1234>   oslc_rm:elaboratedBy    <http://reqs.com/req/7772>

<http://reqs.com/req/1234>   oslc_rm:validatedBy     <http://tests.com/test/521>


<http://tests.com/test/521>   rdf:type                oslc_qm:TestCase

<http://tests.com/test/521>   dcterms:title           "Verify compatibility"

<http://tests.com/test/521>   oslc_qm:usesTestScript  <http://tests.com/script/13>

SPARQL is standard query language for RDF datasets

SPARQL 예

SELECT ?uri ?title WHERE {

   ?uri rdf:type              oslc_rm:Requirement .

   ?uri dcterms:title         ?title .}

결과

uri	title
<http://reqs.com/req/1234>	"Smooth upgrade path"

-