How do I install the XPointer processor?

Download the latest "cweb-xpointer" release from SourceForge. This project uses Apache Maven and Java 1.4+, so you will need to install those as well. Normally you will also want to download one of the XPointer Framework integrations, such as the xpointer+dom4j or the xpointer+jdom package. These "integration packages" provide support for a specific XML Document model.