Customizing the metamodel : Keywords for USRPROPS : NUMERIC
  
NUMERIC
This is one of the allowed types for a property. It specifies that the property is a number – only numbers are allowed to be entered into the field (and plus or minus marks). The LENGTH statement determines the amount of numbers that may be entered into the field. The user will not be able to enter decimal points or any characters into 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 }