The term “custody” refers to decision-making with respect to minor children. Sole custody allows one parent to make all major decisions with respect to children and joint custody allows both parents to make such decisions. The children may reside with one parent primarily in either sole custody or joint custody arrangements. In shared parenting arrangements the children normally reside with both parents equally.
If you are married there is a presumption that both parties have joint decision-making.
Link: Divorce Act (Canada) RSC 1985 c. 3
Family Law Act, SA 2003 c. F-4.5