It might occur (even often with Crossref) that a fetcher is not available right now or the error is on their end 500, 503, 504.
We need a consistent method to pass this information to the user. Now for example the user only sees a DOI not found message but in fact we couldn't look for a DOI in reality.
It might occur (even often with Crossref) that a fetcher is not available right now or the error is on their end 500, 503, 504.
We need a consistent method to pass this information to the user. Now for example the user only sees a DOI not found message but in fact we couldn't look for a DOI in reality.