VirtueMart is an Open Source E-Commerce solution for Joomla! and Mambo.
VirtueMart is released under the GNU Public License, which means by the end, it free for download and use.
There's a small bunch of developers who help in pushing this Shopping Script towards professionality and usability. The author of this documentation is the Lead Developer...and having not much time besides Wife, Work & Studies.
Since VirtueMart is free and Open Source Software, everyone using it can and should contribute to this project.
You can send your code snippets, hints and everything else helpful to the Homepage of the project: http://virtuemart.net.
There's also an active Forum, where discussion and bug reporting can take place: Forum.
DocBook defines a set of markup elements useful for marking up text so that the text can then be transformed into several different formats. It's possible to create documents in different formats: PDF, HTML, HTML Help (.chm Files for Windows Help), XML, RTF, TeX, WordML (Word 2003) and others. The author of this document uses eDE for generating the End-User documents. The idea is to write just once and reach the largest possible number of people with the information. Digital information not stored properly tends to get lost. Due to the fact that not containing uncommon characters (such as binary formats) it's possible to index and search directly on the documents written on SGML and consequently on DocBook. The SGML systems use markups to make their description. DocBook holds over 300 markup elements each one with several attributes which can assume several values, these can be fixed or defined by the document / style that the author has used.