Caché ObjectScript Reference - InterSystems Documentation

RETURN (also known as the key) (ASCII 13), LINE FEED (ASCII 10), and ESCAPE(ASCII 27).You can modify the terminator default when you issue an OPEN or USE command for adevice. OPEN and USE allow you to specify a terminator parameter value. See I/O Devicesand Commands in the Caché I/O Device Guide for details about terminators based on devicetype.Caché does not store the input terminator with the input value for variable-length and fixedlengthreads; it records it in the $KEY and $ZB special variables. Caché does store the inputterminator (if specified) as the input value for a single-character read.Timeout and the $ZA, $ZB, and $TEST Special VariablesREADCaché records the completion status of a READ in the $TEST, $ZA, and $ZB special variables,as follows:Caché ObjectScript Reference 121