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Re: Side effects and interoperability

From: Henry S. Thompson <ht@inf.ed.ac.uk>
Date: Thu, 20 Apr 2006 15:28:07 +0100
To: Jeni Tennison <jeni@jenitennison.com>
Cc: public-xml-processing-model-wg@w3.org
Message-ID: <f5blku0uxs8.fsf@erasmus.inf.ed.ac.uk>

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I have three components/types of components which I use regularly
which violate the proposed "no side-effects" constraint:

1) Escape to substrate and execute program on input, producing output.
   The program is required to take well-formed XML on stdin and
   produce well-formed XML on stdout.

2) Synchronous SOAP exchange.  Ship input to a parameter-specified
   server, wait for a result.

3) A class of special-purpose components which update databases.  Some
   of these are repeatable w/o negative impact, but not all.

ht
- -- 
 Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
                     Half-time member of W3C Team
    2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
            Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
                   URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged spam]
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Received on Thursday, 20 April 2006 14:28:25 GMT

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