Any valid BibTeX entry should be able to auto-link both a URL and a DOI

[goerz]

In DocumenterCitations 1.2, a @book entry could have both a URL and a DOI. The former would be automatically linked from the title, and the latter from the publisher information.

The 1.3 release changed how the auto-links work. From NEWS.md:

There were some subtle changes in how DOI and URL fields are linked in the rendered documentation, which may require adjustments. In particular, in version 1.3.0, non-@article entries that do not have both a title and a booktitle can only have a DOI or a URL, but not both. This most likely occurs for @book entries. For @book entries that have both a DOI and a URL, the URL should be placed in the note field (using \url/\href, as appropriate).

Unfortunately, this means the .bib files that worked fine with version 1.2 had to be modified for version 1.3; arguably a violation of semantic versioning. Thus, the behavior in 1.3 should be considered a bug.

To restore non-breaking compatibility with version 1.2, any entry that defines all the required fields for its specific type should be able to automatically link both a URL and a DOI. For the @book type, both title and publisher/year are required, so it would be safe to link the URL (or DOI, if no URL) from the title and the DOI (if no URL) from the publisher and year information.

Personally, I have some minor aesthetic problems with linking from the publisher, and I would generally prefer to link the URL from the note field for a book that has both a URL and a DOI. However, purely for backwards compatibility, automatic linking should still work, as it worked in version 1.2.