It wasn't an intentional change, so please submit a bug report.

On Friday, June 11, 2021 at 5:42:55 AM UTC-7 Nick Bart wrote:

> I’m seeing this, too (using the most recent dev version), and agree in 
> preferring the ‘old’ behaviour.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Friday, June 11, 2021 11:44 AM, Frederik Elwert <frederi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 
> wrote:
>
> Hello everybody,
>
> when upgrading pandoc in our publication workflow (2.9→2.13), and thus 
> switching from pandoc-citeproc to citeproc, we noticed a change in 
> behaviour:
>
> We are converting all references authors send us to csl-yaml and embedd 
> them within the markdown file through the `references` metadata variable.
>
> Previously, only those entries that were actually cited also got printed 
> in the bibliography. That’s what we expected. Now, with citeproc, we find 
> that *all* entries from the `references` list are printed in the 
> bibliography. This is different from taking the same entries, putting them 
> in an external bibtex file, and include them with the `bibliography` 
> metadata key. If we do that, we get the old behaviour.
>
> So in sum, `references` now behaves like `bibliography` + `nocite: @*`.
>
> Is this the new intended behaviour, or is this a bug/regression?
>
> (For us, the older behaviour worked better, because often authors have 
> additional entries in their bibliography, against the guidelines. The old 
> behaviour made sure we only include those that are actually cited. Now we 
> have to check the references list manually.)
>
> Thanks in advance,
> Frederik
>
>
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