Metasyntax for macros

Kennzeichnung	Meaning	Example
UPPERCASE LETTERS	Uppercase letters denote keywords or constants which must be specified exactly as shown. Keywords begin with *.	ACTION=*INITIALIZE
lowercase letters	Lowercase letters denote the types of values or variables for which current values must be specified by the user, i.e. their value may be different from case to case.	AUTKEY=<var: int:4>
=	The equals sign links an operand to the associated operand value.	SLOTID =<var: int:4>
/	The slash separates simple alternative operand values.	ACTION=*OPENSESSION / *CLOSESESSION
< >	Angle brackets enclose the data type of the operand.	<var: int:4>
underscored values	The underscore indicates the default value, i.e. the value assumed by the system, if no value is specified by the user. Default values which contain the character “_” are indicated with “default:” at the beginning instead of the underscore.	TEMPL = <var: pointer> / NULL no specification implies TEMPL=NULL

Data types of the operand values

Data type	Character set	Special features
integer	0..9,+,-	“+” or “-” may be specified only as the first character. The suffix n..m specifies the permissible value range. Example in syntax diagram: SESSION=<integer 0 .. 2147483647> actual input: SESSION=5
var:		Starts a variable specification. The colon is followed by the data type of the variable. Example in syntax diagram: LEN=<var: int:4> actual input: LEN=100

Data types of variables and register contents

integer (n)	An integer which occupies n bytes, where n <= 4. If the length specification is omitted, n=1 is assumed.
enum NAME(n)	A list which occupies n bytes, where n <= 4. If the length specification is omitted, n=1 is assumed.
pointer	Pointer (the address is passed).