FAQ
In the EPODOC format, only the country code (CC) and document number are mandatory and must be given...
https://www.epo.org/en/service-support/faq/searching-patents/open-patent-services/search-formats
Search formats
Questions and answers
FAQ
In OPS you must use Boolean operators, in Espacenet it is optional. Both services use the Common...
FAQ
The difference in behaviour is due to the way the two systems handle the number formats. Espacenet...