When you get your application package from the College of Nursing in the province you've chosen, it will include a thick stack of papers. There will be verification forms that will have to be processed and returned by your school of nursing, the PRC, any other jurisdiction where you've held a license, and each employer you've worked for. The paperwork has to be processed and returned by these different groups directly to the College of Nursing so as to ensure they're legitimate, a safeguard against fraud so to speak. (If I was able to just send the forms in on my own, I could say I have a Masters degree in nursing on a form when I only have a diploma in nursing and the College would have a hard time proving any of it. That's why they insist that it all be third party. You can't trust EVERYbody so you don't trust ANYbody...)
The documentation they will require from the school of nursing will have a breakdown of exactly what you were taught, how you were taught it and how much practice you got at it. They then compare it to the educational programs in place in that province to see where the differences are. If the differences are too great, they may require you to upgrade your education before allowing you to write the CRNE and obtain a license. In Canada nurses are generalists when they graduate from school and have a solid education in each of the five main areas of nursing: medicine, surgery, pediatrics, obstetrics and psychiatry. Many other countries have different models of nursing education and the nurses are streamed into one area or another. So when they want to come to Canada they're disappointed to find that their education doesn't match and they have to obtain more. This is particularly true for nurses from Australia and the UK. Nurses from the Philippines may face other challenges, in that their education may be considered more the equivalent of the practical nurse education in Canada, as has been the case in Alberta recently. That's a disappointment to everyone: the Filipino nurse will be required to obtain an LPN license and not an RN license, and then be paid quite a bit less money while at the same time upgrading his or her education to be considered an RN, the agency that recruited them may have to renegotiate contracts, the health regions are now needing to find positions for the nurses to fill because their vacancies were for RNs, and the nurses on the floor aren't getting quite the same help they were expecting. So it's a losing proposition all round.
The documentation from the PRC will prove that you've passed the NLE and have been a member in good standing, meaning that they haven't had to take your license away for any reason and that they haven't had any complaints about your care. Same for any other jurisdictions you may have worked in, such as Dubai, Saudi Arabia and the US. Documentation from employers verifies that you really worked there for the time you said, doing the job you described and that there were no big issues they had to take up with you. It seems like a really hard process, and it is, but the colleges have a responsibility to provide the people of that province with a guarantee that the nurses they license are safe and competent.
Does that make things a little clearer for you?