structures

[Joerg Anders]

Hi all!

I'm a LISP, SCHEME and GUILE newbie.  I try to study
Artificial Intelligence.

My problem is: Most published examples use 
the

        (define-struct ...)

function to create und use structures.

I already searched the GUILE mailing list archive and found
(define-struct ...)  seems to be no SCHEME standard
statement.(?)
Is that really true? Or can I load some module with
syntax extentions?
If not: What is a good substitute for (define-struct ...) ?

--
J.Anders, Chemnitz, GERMANY (address@hidden)