The package provides macros that help to build a document repository for long living documents. It focuses on structure and re-use of text, code, figures etc. The basic concept is first to separate structure from content (i.e., text about a topic from the structure it is presented by) and then separating the content from the actual published document, thus enabling easy re-use of text blocks in different publications (i.e., text about a protocol in a short article about this protocol as well as in a book about many protocols); all without constantly copying or changing text.

As a side effect, using the document classes provided, it hides a lot of LaTeX from someone who just wants to write articles and books.