Advanced Topics

The Apache Software Foundation is making XML parsers and document conversion tools from several vendors, including IBM and Sun, available for free at xml.apache.org so that customers can use them to build in-house applications or commercial products.
The Apache XML Project consists of:
- Xerces - XML parsers in Java, C++, and Perl
- Xalan - XSLT stylesheet processors, in Java and C++
- Cocoon - XML-based web publishing, in Java
- FOP - XSL formatting objects, in Java
With these and related tools and modules, Apache becomes capable of serving XML documents to clients