the chunk in parent
the descriptor in parent
the function-name in argument
the property-name in object
The in keyword is used in several places to describe child-parent relationships between objects and arguments to function calls.
It is used in chunk expressions: char 32 in steve
It is used in descriptors for child objects: file "doc.xnd" in folder "Documentation"
It is used in function calls: the sqrt in sixteen
It is used in property descriptors: the location in myRectangle
It is used in operators: steve is an element in bill
It is used in certain control structures: repeat for each myElement in myList
The in and of keywords are synonyms practically everywhere in both XION and HyperTalk, even when it would otherwise make no sense (e.g., the sqrt in 4 or "e" is of "hello").