com.hp.hpl.mesa.rdf.jena.sample
Class Sample4

java.lang.Object
  |
  +--com.hp.hpl.mesa.rdf.jena.sample.Sample4

public class Sample4

extends java.lang.Object

A simple demonstration of reification.

Reification is the term used when one statement is the subject or object of another. It does seem to cause some difficulty in understanding.

This implementation takes a very simple view. A statement is a subclass of resource, and as such can be the subject or object of another statement. Further, it is possible for a statement s2 to be a member of a model m, to make a statement about another statement s1, without s1 being a member of m. This sample code demonstrates this feature.

Version:

Release='$Name: $' Revision='$Revision: 1.1 $' Date='$Date: 2001/01/05 14:17:42 $'

Author:

bwm

Constructor Summary

Sample4()

Method Summary

static void

main(java.lang.String[] args) Create a model m.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Sample4

public Sample4()

Method Detail

main

public static void main(java.lang.String[] args)

Create a model m. Create a statement s1, but do not add it m. Create a statement s2 about s1 and add it to m. Verify that s1 is not a member of m, but s2 is. Create a further statement s3 about s2 and the write the xml serialization of m to the system output stream.

Parameters:

args - the command line arguments - there are none for this application