> 3/ The documentation was written in what format (DocBook?) Are the
> sources and compilation suite used to produce the PDF available?

Hi,
in answer to your questions:
1) I don't think license terms of the documentation has ever been
considered an issue by us - someone higher up than me will have to
answer this...

2) Those PDFs are the latest version. We try to release a new version
of the documentation with each version of the software. They are only
in PDF format, although we have unofficial HTML versions inside our
greenstone documentation collection which were created using the
pdftohtml converter that is distributed with greenstone.

3) I believe the documents were written in Microsoft Word, as this
made it easier (in some respects...) for our documentation authors.

John McPherson