Well...I got inspired. 😁 The Audiobook examples now use the url to properly point at the actual Audiobook and mainEntityOfPage to point to the information page about the Audiobook.

I also chose a freely available audiobook from the kind people at Archive.org and LibriVox. It also happens to be Alice's Adventure's in Wonderland because Mad Hatters.

Cheers!
🎩

A nice simple example.

I would tweak it slightly thus:

{
  "@context": "http://schema.org/",
  "type": "Audiobook",
  "@id": "https://archive.org/details/alices_adventures_1005_librivox",
  "abridged": "false",
  "author": "Lewis Carroll",
  "description": "Alice's Adventures in Wonderland (commonly shortened to Alice in Wonderland) is an 1865 novel written by English author Charles Lutwidge Dodgson under the pseudonym Lewis Carroll. It tells the story of a girl named Alice who falls down a rabbit hole into a fantasy world populated by peculiar and anthropomorphic creatures. The tale is filled with allusions to Dodgson's friends. The tale plays with logic in ways that have given the story lasting popularity with adults as well as children. It is considered to be one of the best examples of the "literary nonsense" genre, and its narrative course and structure have been enormously influential, especially in the fantasy genre. (Introduction by Wikipedia)",
  "datePublished": "2010-05-03",
  "duration": "PT2H31M21S",
  "encodingFormat": "video/mp4",
  "name": "Alice's Adventures in Wonderland",
  "playerType": "M4B compatible",
  "provider": "The Internet Archive",
  "publisher": "LibriVox",
  "readBy": "Eric Leach",
  "contentUrl": "https://archive.org/download/alices_adventures_1005_librivox/AlicesAdventuresInWonderlandV5_librivox.m4b",
  "mainEntityOfPage": "https://archive.org/details/alices_adventures_1005_librivox"
}

There is a difference between the Audiobook (CreativeWork) and the actual bytes of the media object.

@RichardWallis so...this may be a bit Range-14-like, but...

This trimmed example (from your post earlier--and on which I'm basing further commits to this PR) introduces some confusion (at least in my coffee-enhanced cranium):

{
  "@context": "http://schema.org/",
  "type": "Audiobook",
  "@id": "https://archive.org/details/alices_adventures_1005_librivox",
  "contentUrl": "https://archive.org/download/alices_adventures_1005_librivox/AlicesAdventuresInWonderlandV5_librivox.m4b",
  "mainEntityOfPage": "https://archive.org/details/alices_adventures_1005_librivox"
}

That, afaict, says that https://archive.org/details/alices_adventures_1005_librivox is the Audiobook, but that the content of that URL is really at https://archive.org/download/alices_adventures_1005_librivox/AlicesAdventuresInWonderlandV5_librivox.m4b (which is one format/expression of the conceptual Audiobook) and that the "main entity" of https://archive.org/details/alices_adventures_1005_librivox is itself...

I realize that "naming things is hard," but I wanted to double check with you (et al) prior to making these changes.

This is more or less why I'd used url earlier and not @id or contentUrl, but again...I acknowledge this gets a bit Range-14 like...so input welcome! 😁

To avoid this being stalled indefinitely, @RichardWallis how do you feel about my removing the @id (leaving it unidentified...), but leave all the others in place?

To avoid confusion, either the @id value or the mainEntityOfPage value, should be removed or modified. (not that having the same URI for the page and the entity that describes it is implicitly wrong)

My personal preference would to either change the @id value to something like https://archive.org/details/alices_adventures_1005_librivox#work or to drop the mainEntityOfPage value.

To my mind it is more important to identify the thing/entity than the page(s) that may represent it. Having said that, out in the real world it is often the case that the page URL is the only available identifier.

@RichardWallis sorry for the wait on this one. I went with the #work suffix option. Please let me know if it needs anything else!

Github is reporting conflicts in data/ext/bib/bsdo-audiobook-examples.txt - could you take a look?