: Re: What is the minimum required content for a valid ePub? I would like to create my own ePub documents from scratch without a tool so that I have full control over the final result. What is

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In regards to my comments about Tom's ePub not validating there is an error in his toc.xhtml on line 13 and should be coded as <li><a href="1_hello.xhtml">Hello</a></li> which will produce the error message from IDPF validator as:

In regards to the version 3.0 ePub I disagree and believe it should be noted that when an ePub is built as ePub 3.0 format ONLY it will not validate other than 3.0 in epubcheck. This can be achieved and tested in the terminal using epubcheck command line (which is a different question).

If the provided ePub is submitted and ran against epubcheck version 2.0 it will fail for the following:

value of attribute "version" is invalid; must be equal to "2.0"
attribute "property" not allowed here; expected attribute "content", "id", "name", "scheme" or "xml:lang"
element "meta" missing required attributes "content" and "name"
text not allowed here; expected the element end-tag
attribute "properties" not allowed here; expected attribute "fallback", "fallback-style", "href", "media-type", "required-modules" or "required-namespace"
element "nav" not allowed anywhere; expected element "address", "blockquote", "del", "div", "dl", "h1", "h2", "h3", "h4", "h5", "h6", "hr", "ins", "noscript", "ns:svg", "ol", "p", "pre", "script", "table" or "ul" (with xmlns:ns="http://www.w3.org/2000/svg")
element "nav" not allowed anywhere; expected element "address", "blockquote", "del", "div", "dl", "h1", "h2", "h3", "h4", "h5", "h6", "hr", "ins", "noscript", "ns:svg", "ol", "p", "pre", "script", "table" or "ul" (with xmlns:ns="http://www.w3.org/2000/svg")

That displayed my argument with the industry standard is that a version 2.0 ePub CAN be built to support and function with devices that run version 3.0 and it should be coded as such for quality and validation.

Also, if we are talking about what the structure of ePubs are. Using a OEBPS file structure was technically meant for ePub's in version 1. Since it really doesn't matter what the file structure is as long as the container.xml points and finds a true .opf file I petition and build my ePubs like so:

META-INF
-container.xml
xhtml
-toc.xhtml
-.xhtml files
css
-stylesheet.css
content.opf
toc.ncx
mimetype

I find it easier for maintenance and less annoying searching for a .opf or .ncx file in either OEBPS, OPS, OPF, etc. etc. file structures.

Also Im a big fan of commenting my code and since it will not change the performance I code my manifest as such:

<item id="toc" href="toc.xhtml" media-type="application/xhtml+xml" />
<item id="hello" href="1_hello.xhtml" media-type="application/xhtml+xml" />

<item id="css_file" href="stylesheet.css" media-type="text/css" />
</manifest>

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