Dear developers, dear members of the Project Management,

we work on a research project called "XML-Print" at the University of
Trier, Germany. The idea is to implement (or improve) a XML to PDF
typesetter with an easy-to-use GUI which helps humanists to publish
their critical editions, dictionaries etc. It will be part of the
toolkit "TextGrid Lab" which is a long-term project to develop a general
framework containing different tools for collaborative work on digital
documents (

Having looked at existing approaches FOP seems to be a stable and
promising base to build on. However there are some features missing
either not yet implemented in FOP itself or even not defined in XSL-FO 1.1.

We therefore would have to implement features based on XSL-FO 1.1, but
also on the requirements for XSL-FO 2.0 as described in

Among others we are especially interested in some elements mentioned in
the current design draft like

- marginalia (2.2.3)
- side-by-side flows (2.2.6)
- line numbering ( **
- cross references (2.2.8)

**  The line numbering will also involve some more complex issues, not
only a simple line numbering of every n-th line. For example there could
be interactions between line numbers and marginalia, which have to be
considered in the typesetting process.

We would also have to design and implement new layout features currently
not mentioned in any seen XSL-FO design draft like the usage of a
complex bibliographic apparatus or a grid typesetting feature. There are
also requirements for complex footnotes, which may lead to an extension
of the currently available footnote mechanism in the XSL-FO standard.

At the current point in our work we wonder how we can use the current
status of FOP, how we can embed our work into future releases and last
but not least, give some work back to the community. One developer would
work full-time on FOP for at least one year.

Furthermore we would like to know if an early implementation of
requirements -- using a separate namespace of course -- is somehow
wanted and if there is any other group working on them. What would be
the next steps for us?

Thank you for any responses.

Best regards and Happy Holidays from
Martin Sievers and Roland Schwarz

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