EPUB Preflight (Style Checking)

Paul Norton from Adobe Digital Editions has now released the epubpreflight validation tool. This small utility is meant as a compliment to epubcheck and is used to check that your ePub files are suitable for Mobile devices. There are many guidelines that need to be followed when developing ePub for mobile devices that are not mentioned in the EPUB specs, so this is going to be a very welcome tool.

Here’s a list of things that epubpreflight currently checks for;

  • Content files that are empty.
  • Content files that are over 300KB.
  • Image files that are empty.
  • Image files that are over 10MB.

As you can see the list is rather small at the moment but this will grow in time. On the DE blog, Paul also mentions that he would like to see a set of configuration files that could test for specific platforms (ADE, PRS505, conversion to other formats, etc.)

It’s going to be a good number of years yet before mobile devices have the power to parse very large files (images, chapters, etc) so it’s going to be in everyone’s interest to see this tool developed.

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