Evaluation appt at Mayo Clinic?

July 11th I have appt with a Hematologist at Mayo in Rochester for my Myelofibrosis. (a blood cancer) The oncologist from Luther Midelfort reffered me to Mayo and called it an Evaluation. My blood counts don't signal urgency in having a bone marrow transplant or anything, but the oncologist said they want to find me a match to a donor so that when/if I require the transplant, it will be available. What will be done during this evaluation?