NUMERIC is one of the allowed types for a property. It specifies that the property is a number: only numbers (and plus or minus signs) are allowed to be entered in the field.
The LENGTH statement determines the amount of numbers that can be entered in the field. The user cannot enter decimal points or any characters in the field; only numbers and plus or minus marks.
Example
SYMBOL "Process" IN "Data Flow Gane & Sarson" { PROPERTY "Short Description" { EDIT Text LENGTH 1500 } PROPERTY "Number" { EDIT Numeric LENGTH 4 }