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RE: key declarations (using a sequence constructor)

Subject: RE: key declarations (using a sequence constructor)
From: "Michael Kay" <mike@xxxxxxxxxxxx>
Date: Wed, 7 Oct 2009 12:33:09 +0100
RE:  key declarations (using a sequence constructor)
> Do they just make 
> a string with some kind of separator breaking up the attributes?
> Isn't there a chance of this failing if the character used 
> for the separator is used in one or more of the attributes?

Yes, and yes.

Unicode gives a wide range of characters to choose from, including the
Private Use area.

An alternative approach is to create separate keys one for each attribute,
and then to search using

key('ka', @a) intersect key('kb', @b) 


Michael Kay

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