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              README file for the DocBook XSL Stylesheets
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These are XSL stylesheets for transforming DocBook XML document
instances into .epub format.

.epub is an open standard of the The International Digital Publishing Forum (IDPF), 
a the trade and standards association for the digital publishing industry. 

An alpha-quality reference implementation (dbtoepub) for a DocBook to .epub 
converter (written in Ruby) is available under bin/. 

From http://idpf.org
  What is EPUB, .epub, OPS/OCF & OEB?

  ".epub" is the file extension of an XML format for reflowable digital 
  books and publications.  ".epub" is composed of three open standards, 
  the Open Publication Structure (OPS), Open Packaging Format (OPF) and 
  Open Container Format (OCF), produced by the IDPF. "EPUB" allows 
  publishers to produce and send a single digital publication file 
  through distribution and offers consumers interoperability between 
  software/hardware for unencrypted reflowable digital books and other 
  publications. The Open eBook Publication Structure or "OEB", 
  originally produced in 1999, is the precursor to OPS. 

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.epub Constraints 
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.epub does not support all of the image formats that DocBook supports.
When an image is available in an accepted format, it will be used. The
accepted @formats are: 'GIF','GIF87a','GIF89a','JPEG','JPG','PNG','SVG'
A mime-type for the image will be guessed from the file extension, 
which may not work if your file extensions are non-standard.

Non-supported elements:
  *  
  * , , ,  with text/XML 
    @filerefs
  * 
  *  in lists (generic XHTML rendering inability)
  *  (just make your programlistings 
    siblings, rather than descendents of paras)

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dbtoepub Reference Implementation
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An alpha-quality DocBook to .epub conversion program, dbtoepub, is provided
in bin/dbtoepub. 

This tool requires:
 - 'xsltproc' in your PATH
 - 'zip' in your PATH
 - Ruby 1.8.4+

Windows compatibility has not been extensively tested; bug reports encouraged.
[See http://www.zlatkovic.com/libxml.en.html and http://unxutils.sourceforge.net/]

$ dbtoepub --help
  Usage: dbtoepub [OPTIONS] [DocBook Files]

  dbtoepub converts DocBook  and s into to .epub files.

  .epub is defined by the IDPF at www.idpf.org and is made up of 3 standards:
  - Open Publication Structure (OPS)
  - Open Packaging Format (OPF) 
  - Open Container Format (OCF)

  Specific options:
      -d, --debug                      Show debugging output.
      -h, --help                       Display usage info
      -v, --verbose                    Make output verbose


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Validation
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The epubcheck project provides limited validation for .epub documents. 
See http://code.google.com/p/epubcheck/ for details.

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Copyright information
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See the accompanying file named COPYING.