3. Xeproc Model URI referenced resources in plug-in, project or remote spaces Component Document processing XML input XML output Validation Schema Reference set View Specification in renderer syntax Applied on step output Manual correction Import and export of annotations Extension points paletteComponent Pdftoxml xeprocPlayer Full play on demand stepplayer Xsltproc validator XSD / rnc/ rng schemas Versus Reference renderer Xslt based renderingViewer SWT browser ATF mozilla Java classpath xeprocURI resolvers Xeproc monitoring extensibility http://www.xrce.xerox.com/Research-Development/Services-Innovation-Laboratory/Document-Structure/Xeproc-C-a-model-for-XML-document-processing