Answers.Body: <p>No it is a valid file if there are several chapters in one file. You can even have the whole book as one HTML file.</p>
  
  <p>The <a href="http://www.idpf.org/epub/301/spec/epub-overview.html#sec-content-docs" rel="nofollow">epub spec</a> says</p>
  
  <blockquote>
    <p>Each Rendition of an EPUB Publication contains one or more EPUB Content Documents</p>
  </blockquote>
  
  <p>Book marks can be made to a point in the file so don't need separate files.</p>
  
  <p>Readers have a limit to the size of the HTML file and I think that is a reason to split the files.</p>
  
  <p>Again with movement in the files it depends on the reader. Having smaller files might well help the reader as it can cache a whole file</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-07-15T19:39:37.803Z
Answers.LastActivityDate: 2016-07-15T19:44:52.780Z
Answers.LastEditDate: 2016-07-15T19:44:52.780Z
Answers.UserDisplayName: mmmmmm
Body: <p>Is this the rule or can I find several chapters in an html file?
  Having 1 chapter helps moving back and forth chapters or set bookmarks.</p>
  
Tags: <epub><html><formatting>
Title: Can I expect one chapter per html file in an Epub?
UserDisplayName: narb
ThreadText: # Can I expect one chapter per html file in an Epub?
  
  (Asked by: username_0 on 2016-07-15)
  
  Is this the rule or can I find several chapters in an html file?
  Having 1 chapter helps moving back and forth chapters or set bookmarks.
  
  **Tags:** epub, html, formatting
  
  
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  ## 1 answers
  
  ### Answer by username_1 on 2016-07-15. Score: 1 | Accepted answer
  
  No it is a valid file if there are several chapters in one file. You can even have the whole book as one HTML file.
  
  The [epub spec](http://www.idpf.org/epub/301/spec/epub-overview.html#sec-content-docs) says
  
  > Each Rendition of an EPUB Publication contains one or more EPUB Content Documents
  
  Book marks can be made to a point in the file so don't need separate files.
  
  Readers have a limit to the size of the HTML file and I think that is a reason to split the files.
  
  Again with movement in the files it depends on the reader. Having smaller files might well help the reader as it can cache a whole file
  
  
  ---
  
  