• Apache Ant
• PHP 5 (with DOM, PCRE, SPL, and Tokenizer extensions enabled)
• Ruby
• xsltproc

To build the complete documentation use:

cd build
ant

To build only one version of the documentation use:

cd build
ant build-LANG-VERSION

for example

cd build
ant build-en-4.3

The generated files will be in build/output/VERSION/LANG.