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I was wondering if there is any feature present in EPUB3 or other e-reading formats, either via scripting or some other route, that enables the reader/user to upload audio/video/images (or link to external sources of these) on their own to an e-book (depending upon e-reader support) thus creating a unique e-book of their own ? If not, is this capability something we'll see in future versions ebooks ? From my current understanding, it looks like that it is possible to add multimedia using media overlays in epub3, but I am not sure if this is something that a reader can do as well. Using javascript it seems like it could potentially be done, that is allowing the reader to add multimedia that then becomes part of the ebook, would really like to hear people's thoughts on it. Thanks.
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There's no support for that currently. EPUB is intended to be a one-way delivery system, that is why it's contents are packaged in a predictable format with strict specifications. In order to alter the contents of an Epub you must unzip the file into its constituent parts.
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The epub 3.0 spec forbids scripts from changing the DOM of the document, so this will not be possible. Here's the relevant bit:
It must not allow a container-constrained script to modify the DOM of
the parent Content Document or other contents in the EPUB Publication,
and must not allow it to manipulate the size of its containing
rectangle. (Note: Even if a script is not container-constrained, the
Reading System may impose restrictions on modifications (see also the
dom-manipulation feature).)
This is required for security purposes. It sounds like in order to do what you're talking about, you'll need an app rather than an ebook.
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