BE doesn't have an 'In Proceedings' type so imported Bibtex of the '@inproceedings' type (e.g. most ACM DL papers) ends up in the wrong type as 'Conference Proceedings' are
exported to bibtex as type '@proceedings' rather than '@inproceedings' leading to downstream formatting errors.
I set up an 'In Proceedings', and in the import filter moved the existing 'InProceedings' mapping from 'Conference Proceedings' to 'In Proceedings'. Unfortunately input failed until I set the mapping to
Import then worked. I can't now figure out if the manual is wrong - it implies Bibtex imports are non-case-sensitive, or a bug in the import filter. Other parts of the Bibtex workflow are case-insensitive when it comes to Bibtex '@' data types so it looks like a poor configuration choice in BE, AFAICT.
Knock on problem. How do I select 500+ wrongly typed references and set them to BE- type 'In Proceedings'? Currently, I seem to be forced to change them one at a time which seems oddly laborious given the above and the inbound coercion to the wrong (export) type.