Original author(s) Operating system | Type XSL-FO | |
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Developer(s) Apache Software Foundation Stable release 2.1 / January 14, 2016; 13 months ago (2016-01-14) | ||
Formatting Objects Processor (FOP, also known as Apache FOP) is a Java application that converts XSL Formatting Objects (XSL-FO) files to PDF or other printable formats. FOP was originally developed by James Tauber who donated it to the Apache Software Foundation in 1999. It is part of the Apache XML Graphics project.
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FOP is open source software, and is distributed under the Apache License 2.0.
Current Status
The latest version of Apache FOP is 2.1. This is the fifth stable release and implements a large subset of the XSL-FO Version 1.1 W3C Recommendation. In version 0.95, the code had undergone a substantial rewrite compared to 0.20.5 which was the previous stable version. As of release 0.91alpha, FOP became much more compliant to the XSL-FO Recommendation.
Major Limitations
Most important elements added in XSL-FO 1.1 (flow maps, table markers, indexes. etc.) are not available
In addition, older XSL-FO 1.0 features are still not fully supported including automatic table layout, floats and more.
Input Support
Apache FOP supports embedding a number of image formats in the XSL-FO (through the <fo:external-graphic> element). These include:
Apache FOP implements the <fo:float> element with some limitations. In versions prior to 2.0, external graphics objects were limited to being drawn inline or in a block with no wrapped text.
Output Formats
Apache FOP supports the following output formats:
In progress: