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Chess Viewer: Demonstration of XSL FO and XEP

The power of XSL lies in its ability to perform radical transformations of the XML data source. This page contains yet another proof for this fact: you can build a chessgame viewer with a stylesheet!

The source document is a transcription of a chess game played by Garry Kasparov against a chess supercomputer -- IBM Deep Blue. The game is encoded in a form resembling the well-known Portable Game Notation (PGN) format. The source is very compact: a sample game on this page [DeepBlue.xml] is less than 4 kBytes in size.

The stylesheet converts this arid text into a sequence of board diagrams, drawing every intermediate position as a graphical image (a special chess font is used). Applying a 23 kB stylesheet [chess.xsl], we get a 415 kBytes (!) FO stream []. These numbers give an idea of how deep the transformation is.

The final step of the whole procedure consists in converting the result into PDF using XEP. The resulting PDF file [DeepBlue.pdf] is much smaller than the source FO stream -- less than 90 kBytes. (XEP implements PDF compression).

We hope XSL fans will enjoy this example; and XSL foes will acknowledge its power!

More chess games created by the same stylesheet:


FO Source  

PDF PostScript
Robert Fischer - Max Euwe  Fischer-Euwe.pdf 
Robert Fischer - Mikhail Tal  Fischer-Tal.pdf 
Garry Kasparov - Anatoly Karpov  Kasparov-Karpov.pdf 

We have used an unabridged chess notation; the original PGN data are even more concise. We know it is possible to process even the short chess notation by XSL, and gladly leave this exercise to volunteers .



May 15, 2019
XEP 4.29 released

New rx:barcode extension;
bug fixes: PDF Form Fields,
font subsetting, SVG;
XEPWin: No JRE installer.
More news...

October 11, 2018
XEP 4.28 released

Digital Signature form field;
Adobe Cross mark;
Improved Checkmark Position;
XMP Metadata injection.
More news...

August 1, 2018
EnMasse 3.2 released

Multi-service mode - Fork;
improved Cliser logs;
simplified config format;
improved sample client.
More news...

April 18, 2018
XEP 4.27 released

PDF/A-3 attachments;
Date fields in PDF forms;
KERN and GPOS support;
security permissions extended.
More news...

October 23, 2017
XEP 4.26 released

PDF/UA compliance;
Section 508 Tagged PDF;
linearization improvements;
Cliser: HTTPControl port on/off.
More news...

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