• # comment use to comment script

• catchup on; catchup off; use to turn CATCHUP mode on and off

• function calls perform data manipulation functions

• for (variable in array) {statements } loops through all elements of an array

• else {statements } standard if/else processing

• while (condition) { statements } loops until the condition is false

• break; causes processing on the current line to stop

• reject; also causes processing on the current line to stop

• stop causes script processing to terminate

• { statements } group of statements (action) performed on every line if no pattern exists

• clearvars; initializes all variables but built-in variables

• accept ("recordname")

• <"fieldname"> <len> expr, ...; returns a record to the Map Designer with the values contained in the expression list