URIResolverImpl is a simple JAXP javax.xml.transform.URIResolver implementation for XMLDB databases, such as Xindice. It is intended to be an example only of a URIResolver implementation, and is not production-quality code.
You will need a JDK/JRE 1.3.x (or higher) to run the demo. All other required software is included. Read the README file in the distribution for instructions.