I'm trying to create custom validation ranges for my data fields in FileMaker Pro 11. I know you can set a range of permissible values using the "In Range" section of the Validations tab in the Field Options window for any given field, but I'd like to create a range AS WELL AS be able to enter a non-numeric value, such as a period. Is this possible? Do I need to specify my own calcuation to do this? Thanks in advance.