Answers.Body: <p>There is some hope on the horizon for the many users of EPUB3 files¹<br>
  <a href="https://github.com/takahashim" rel="nofollow">masayoshi takahashi</a> has presented a relatively small pull request with <a href="https://github.com/user-none/Sigil/pull/11/files" rel="nofollow">changes for the Sigil</a> source base that does prevent Sigil from breaking the OPF file when saving EPUB 3.</p>
  
  <p>Hopefully the next Sigil release will incorporate these. In the mean time you can of course compile your own Sigil to include these changes, try them out and report any issues if you encounter them.</p>
  
  <p>¹ <sub>The style-sheet facilitates in EPUB 3 support the top-bottom written languages, most Japanese EPUB Ebooks are EPUB 3</sub><br></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-03-16T07:49:32.033Z
Answers.LastActivityDate: 2014-03-16T07:49:32.033Z
Answers.UserDisplayName: Anthon
Answers.Body: <p>Personally, I stay away from Sigil and Calibre precisely because they break files and don't show you exactly what they're doing&mdash;unless a tool lets me modify all the navigational files directly, I'm not going to trust that it's doing things correctly. I use <a href="http://notepad-plus-plus.org/" rel="nofollow">Notepad++</a> or <a href="http://www.geany.org/" rel="nofollow">Geany</a> for epub editing. If you must use an editor, try the <a href="http://www.bluegriffon-epubedition.com/BGEE.html" rel="nofollow">Blue Griffon Epub Edition</a> or the <a href="http://www.oxygenxml.com/" rel="nofollow">Oxygen XML Editor</a>; they're much more powerful tools.</p>
  
  <p>So, to answer the question "what can I do about Sigil breaking epub 3 files": Don't use Sigil.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-03-17T19:28:12.690Z
Answers.Text: I agree with your answer but I wouldn't recommend a bloated over priced software solution like Oxygen and if I'm going to spend 200 USD for Blue I would spend half of that and learn how to build ePubs from scratch.
Answers.UserDisplayName: DᴀʀᴛʜVᴀᴅᴇʀ
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-03-17T19:32:51.733Z
Answers.Text: Yeah, I don't use Blue Griffon or Oxygen because of the cost. Of the two, I would pick up Oxygen first because it can do XSLT transformations, which can be very handy; many publishers have their files in various XML formats, and a good XSLT can easily transform this into epub.
Answers.UserDisplayName: Tom
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-03-17T18:46:10.560Z
Answers.LastActivityDate: 2014-03-17T18:46:10.560Z
Answers.UserDisplayName: Tom
Body: <p>Sigil is an <a href="http://web.sigil.googlecode.com/git/files/OEBPS/Text/faq.html" rel="noreferrer">EPUB2 editor</a>, but that doesn't prevent people from editing EPUB3 files, which end up with broken OPF when you save them.</p>
  
  <p>Sigil development seems to have stalled, the last year has primarily seen bug fixes instead of development of new features and there seems no active development to support the latest version of the EPUB standard after the an <a href="https://code.google.com/p/sigil/wiki/EPUB3SupportIssues" rel="noreferrer">assessment made in 2013</a>. </p>
  
  <p>Should I look for another editor that at least doesn't break my EPUB 3 files, even if not supporting all EPUB 3.0 features?</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2014-05-22T18:01:28.783Z
Comments.Text: The assessment you link does not even consider supporting both formats fully. Oh dear.
Comments.UserDisplayName: Raphael
Tags: <epub><sigil>
Title: What can I do about Sigil breaking EPUB3 files
UserDisplayName: Anthon
ThreadText: # What can I do about Sigil breaking EPUB3 files
  
  (Asked by: username_0 on 2014-03-16)
  
  Sigil is an [EPUB2 editor](http://web.sigil.googlecode.com/git/files/OEBPS/Text/faq.html), but that doesn't prevent people from editing EPUB3 files, which end up with broken OPF when you save them.
  
  Sigil development seems to have stalled, the last year has primarily seen bug fixes instead of development of new features and there seems no active development to support the latest version of the EPUB standard after the an [assessment made in 2013](https://code.google.com/p/sigil/wiki/EPUB3SupportIssues).
  
  Should I look for another editor that at least doesn't break my EPUB 3 files, even if not supporting all EPUB 3.0 features?
  
  **Tags:** epub, sigil
  
  > **Comments:**
  > **username_1**: The assessment you link does not even consider supporting both formats fully. Oh dear.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_0 on 2014-03-16. Score: 3
  
  There is some hope on the horizon for the many users of EPUB3 files¹  
  [masayoshi takahashi](https://github.com/takahashim) has presented a relatively small pull request with [changes for the Sigil](https://github.com/user-none/Sigil/pull/11/files) source base that does prevent Sigil from breaking the OPF file when saving EPUB 3.
  
  Hopefully the next Sigil release will incorporate these. In the mean time you can of course compile your own Sigil to include these changes, try them out and report any issues if you encounter them.
  
  ¹ The style-sheet facilitates in EPUB 3 support the top-bottom written languages, most Japanese EPUB Ebooks are EPUB 3
  
  
  ---
  
  ### Answer by username_2 on 2014-03-17. Score: 2
  
  Personally, I stay away from Sigil and Calibre precisely because they break files and don't show you exactly what they're doing—unless a tool lets me modify all the navigational files directly, I'm not going to trust that it's doing things correctly. I use [Notepad++](http://notepad-plus-plus.org/) or [Geany](http://www.geany.org/) for epub editing. If you must use an editor, try the [Blue Griffon Epub Edition](http://www.bluegriffon-epubedition.com/BGEE.html) or the [Oxygen XML Editor](http://www.oxygenxml.com/); they're much more powerful tools.
  
  So, to answer the question "what can I do about Sigil breaking epub 3 files": Don't use Sigil.
  
  > **Comments:**
  > **username_3**: I agree with your answer but I wouldn't recommend a bloated over priced software solution like Oxygen and if I'm going to spend 200 USD for Blue I would spend half of that and learn how to build ePubs from scratch.  
  > **username_2**: Yeah, I don't use Blue Griffon or Oxygen because of the cost. Of the two, I would pick up Oxygen first because it can do XSLT transformations, which can be very handy; many publishers have their files in various XML formats, and a good XSLT can easily transform this into epub.  
  
  ---
  
  