MUF Notation

When describing MUF primitives, library functions, or other functions there is a common notation used to describe the stack before and after the command is executed.

The following symbols represent the various data types:

--	The primitive or function itself
a	address of a function
b	(or bool) an integer that only will have 0 or 1 as it's value
d	database reference (e.g. #1)
i	integer
l	lock
s	string
v	variable
x, y, z	Any of the above
X#, Xn	(where X is one of the above) refers to the #th of that type: d1 d2 d3 refers to the 1st dbref, 2nd dbref..etc.

Using these symbols, a function or primitive is described like this: getpropval ( d s -- i )

The symbols 'd s' which are before the -- are stack items that the primitive (getpropval) needs. The symbol 'i' represents the integer that will be pushed onto the stack after the primitive executes.