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XSL FO to HTML Converter

XSL Formatting Objects are an XML dialect so they may be converted using an XSL style sheet. The translator is an attempt to materialize this idea.



XEP Engine

These style sheets have been prepared by RenderX development team as an add-on to our principal product, XEP Engine. Please download the style sheet and try to view your favorite XSL FO (XSLFO) documents in a browser. Don't expect the result to be perfect — see below about limitations. If you plan to extend it to cover more or another version of the recommendation, please share your accomplishments with us.


Possible Use

A stylesheet like this may be used to reduce the complexity in a publishing system with multiple target media. It enables you to generate XSL FO (XSLFO) from semantic XML data, and use it as a source for all other presentation formats. When your data structure changes, you only have to modify XML-to-XSL FO stylesheet


Technical Notes

The stylesheet tries to convert XSL FO (XSLFO) data into HTML+CSS1. CSS2 support is still rare among browsers, and hardly can be relied upon. Even with CSS1, there are many discrepancies between Microsoft Internet Explorer and Netscape Communicator. However, one can hardly do this task without using any stylesheet capabilities at all, so CSS1 seemed to be a common denominator.

It goes without saying that XSL FO (XSLFO) is much more powerful than HTML+CSS1. Moreover, since paged media are organized differently from scrollable media, absolute similarity is not achievable. Therefore, the conversion aims mostly at giving the user a possibility to browse XSL FO (XSLFO) files, without pretending to preserve all formatting subtleties predisposed for quality printing. The task is also simplified by common vocabulary shared by XSL FO (XSLFO) and CSS. With this premises, the problem can be solved by amazingly simple means. A 30 kb stylesheet does the bulk of the work.

Certainly, not everything can be achieved easily. For instance, calculating the inheritance propagation along the FO tree is a really tough task, as is parsing CSS2 shorthands in XSLT. We didn't even attempted to tackle this. in our opinion, this is more easily achieved by a preprocessor. RenderX has such a preprocessor built into XEP, redirecting its output into a file gives us a "canonical" XSL FO (XSLFO) document — with all shorthands expanded, inheritance propagated, length units normalized, etc.

However, if your XSL FO (XSLFO) documents do not make use of shorthands, multiple columns, absolutely positioned blocks and similar advanced features, the results of the conversion can be very close to the truth even without preprocessing. This requires special care while writing XSL FO (XSLFO) stylesheets, but our experience shows it can be accomplished.


March 5, 2011
XEP 4.19 released

New extensions for RichMedia in PDF,
sticky notes and file attachments, and
overprinting. Extended XSL1.1 scaling
attributes, and styling for bookmarks.
XForms output, support for SVG in XPS
generator, and other improvements.

More news...

March 1, 2011
RenderX at 2011 AIIM

Visit us in Booth #1820 and #1109 at
the Walter E. Washington Conv. Center,
Washington D.C., March 22 - 24, 2011

More news...

February 22, 2011
VisualXSL 2.4.2 released

Improved support for large designs.
Fully configurable custom template
generation. UI related bugfixes
and table editor improvements.

More news...

December 8, 2010
VisualXSL 2.4 released

Support for external EXSLT library -
Mvp.Xml EXSLT.NET module. UI & logic
related bugfixes. Improved XSLT security.

More news...

October 19, 2010
VDPMill 3.4 released

Major release: a GUI application
for full job control, lots of usability
improvements, and bug fixes.

More news...

September 27, 2010
XEPWin 3.0 released

Release enables better utilization
of computational resources in multi-
core environments. XEPWin 3.0 also
contains improvements in configuration,
error reporting and XEPWin API.

More news...

September 8, 2010
EnMasse 2.3 released

EnMasse is now easier than before!
The Windows version includes
a graphical configuration editor
with built in validation support.
The platform-independent version
was shipped with command-line
installer and configuration script.

More news...

August 25, 2010
VDPMill 3.3 released

Release brings job queuing application
with an XML-RPC interface, VDPMill
Control Panel as a console to configure
and run VDPMill components, a user-
friendly GUI application to create
VDPMill job tickets.

More news...

June 3, 2010
VDPMill 3.2 released

Release includes XML job ticket support
as the main format for GUI application
project files, customized post-
processing (OMR, Transpromo) support
for separated/joined output.

More news...

May 4, 2010
VisualXSL 2.3.1 released

Release includes JavaScript for
radiobuttons and action buttons
in PDF forms, further improvements
over Undo operations, and several
display problems.

More news...

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