From: ma_friedrich@gmx.de
To: designCPN@daimi.au.dk
Date: Thu, 24 Jul 2003 17:15:56 +0200 (MEST)
Subject: (dCPN) Question regarding the use of SML datatypes

Dear ladies and gentlemen,
I am a Civil Engineer student and I am working with Design/CPN in the course
of my diploma thesis. 

The following problem occured:
Based on the findings in the literature I tried to construct a variable that
can either have the type of an integer or a string- at the same time.
In SML it is possible to construct the variable as followed
datatype int_or_real = I of int| S of string;

Now, if I try to construct the same variable in the course of Design, I
cannot tell the program to do so- various problems occur.
Can you help me solving this problem?

I would be more than grateful, if you could.
Thank you very much in advance.
Martina Friedrich

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