Just as historical note. The feature was very old - and we had some manual assignment possiblity:
We then had some local text-based parsing.
However, this did not always work, therefore, we are using Grobid’s capabilities. This should work “good enough”.
If not, please report back. We maybe have synergies with our new offline reference-from-PDF feature. We provided a description of it at Parsing references from the PDF.