• To: <hhalpin@i...>,"'Uche Ogbuji'" <uche.ogbuji@f...>
• Subject: RE: The Airplane Example (was Re: Streaming XML)
• From: "Michael Kay" <mike@s...>
• Date: Sun, 2 Jan 2005 17:03:11 -0000
• Cc: <xml-dev@l...>
• In-reply-to: <2092.66.57.24.44.1104637304.squirrel@66.57.24.44>
• Thread-index: AcTwfTJgds4lG14MSK+LgyAawpM6pQAbrcgw

> Still, if someone was going to use XML in some capacity to 
> shoot missles
> or aid in flying airplanes (which, given the increasing 
> variety of things
> XML is used for, could happen soon!),


One of the biggest mistakes is to assume that systems are only
safety-critical if they physically control the hardware that is capable of
doing the damage.

I came across a stylesheet recently with a bug: it was designed to display
out-of-range data in red, and this wasn't happening, because the code was
doing a string comparison rather than a numeric comparison. I can think of
many scenarios where this could have fatal consequences: admittedly they all
have a human in the loop, but that's not guaranteed to prevent the disaster
happening.

Michael Kay
http://www.saxonica.com/

• References:
  • Re: The Airplane Example (was Re: Streaming XML)
    • From: hhalpin@i...

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