EmEx allows you to combine multiple projects to accelerate the search.
EmEx 3 add a unprocessed links from this project into a new, as if you downloaded a list of references
All unprocessed links will be treated as processed, i.e. in finding such a link in any document or EmEx 3 will not include it in the queue
All unprocessed links will be ignored and not added to queue
Processed links from the project will be skipped. If these links will then be found in any documents, they will be ignored
Failed links will be treated as processed and will not be added to the project, as well as in the case will be ignored in any document.
Results are saved in the original project will be ignored.