Package org.eclipse.rdf4j.rio.rdfxml.util

Class RDFXMLPrettyWriter

java.lang.Object
org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter
org.eclipse.rdf4j.rio.rdfxml.RDFXMLWriter
org.eclipse.rdf4j.rio.rdfxml.util.RDFXMLPrettyWriter
All Implemented Interfaces:
Closeable, Flushable, AutoCloseable, CharSink, Sink, RDFHandler, RDFWriter
public class RDFXMLPrettyWriter extends RDFXMLWriter implements Closeable, Flushable
An extension of RDFXMLWriter that outputs a more concise form of RDF/XML. The resulting output is semantically equivalent to the output of an RDFXMLWriter (it produces the same set of statements), but it is usually easier to read for humans.

This is a quasi-streaming RDFWriter. Statements are cached as long as the striped syntax is followed (i.e. the subject of the next statement is the object of the previous statement) and written to the output when the stripe is broken.

The abbreviations used are typed node elements, empty property elements and striped syntax. Note that these abbreviations require that statements are written in the appropriate order.

Striped syntax means that when the object of a statement is the subject of the next statement we can nest the descriptions in each other.

Example: 

 <rdf:Seq>
    <rdf:li>
       <foaf:Person>
          <foaf:knows>
             <foaf:Person>
               <foaf:mbox rdf:resource="..."/>
             </foaf:Person>
          </foaf:knows>
       </foaf:Person>
    </rdf:li>
 </rdf:Seq>

Typed node elements means that we write out type information in the short form of 

 <foaf:Person rdf:about="...">
     ...
  </foaf:Person>

instead of 

 <rdf:Description rdf:about="...">
    <rdf:type rdf:resource="http://xmlns.com/foaf/0.1/Person"/>
     ...
  </rdf:Description>

Empty property elements are of the form 

 <foaf:Person>
    <foaf:homepage rdf:resource="http://www.cs.vu.nl/˜marta"/>
 </foaf:Person>

instead of 

 <foaf:Person>
    <foaf:homepage>
       <rdf:Description rdf:about="http://www.cs.vu.nl/˜marta"/>
    <foaf:homepage>
 </foaf:Person>
Author:
Peter Mika (pmika@cs.vu.nl)