Hi alijumani,
Thanks for your reply. I hope we get the good news soon. The passport was already submitted with the application (as it was a paper based application) and hope that we get the visa/work permit soon.
We provided
1. a letter of invitation from my side
2. copies of all of my immigration documents (study permit, visa etc)
3. a letter from my department stating my progress, gpa, and the remaining duration of my studies; plus details of my financial support as RA, TA, and fellowship
4. a recommendation letter from my supervisor
5. explanation letter by my wife (the applicant)
6. Her educational documents; and all other required forms/documents
7. My bank statements and property documents to prove that I can support her in Canada
I hope this answer your question.
-ali