Each lot consists of 2 columns labeled "A" and "B" and 6 or 7 rows of grave plots. A "whole lot" would consist of both the A and B columns and only 1 of the rows. For example, Lot 10 row 4 would be a "whole lot" and would normally have room for 10 graves.
Lot 10A row 4 would be a "half lot" and would normally have room for 5 graves. The lot can be subdivided further all the way down to a single grave. A subdivided half lot would have a number on the end of the lot number. For example, Lot 10A1 row 4 could be a single grave or a plot for 2 graves.