I think I made the original version of the core BibTeX importer plugin. It’s a very thin wrapper around this JavaScript library:
The current code uses the library to parse the incoming BibTeX string, and creates a tiddler for each entry as follows:
* The title is set to the citationKey of the entry
* The field bibtex-entry-type is set to the entryType of the entry
* The remaining entry tags are converted into tiddlers of the same name prefixed with “bibtex-“
As far as I can tell, we’re picking up all the information that is exposed by the parser, but if there’s anything we’re missing do let me know,
Best wishes
Jeremy