[xsl] side effect definition

Subject: [xsl] side effect definition
From: "Gavin Bong" <gavinb@xxxxxxxxx>
Date: Tue, 20 Feb 2001 15:24:32 +0800
I just want to make sure that I understand what
the term "side effect free" mean. Is my simplistic
understanding, stated below accurate:

"Assuming no usage of extension functions or elements,
pure XSLT programming is side effect free because it
doesn't maintain global state." -- Gavin

If I do use extension functions or elements, what design
patterns are available to guide me such that I do
*not* violate the "side effect free" feature of XSLT ?

Regards,

Gavin Bong

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