confused by ranges
dan at langille.org
Mon Sep 20 06:19:55 PDT 2004
On 19 Sep 2004 at 10:24, Jacques A. Vidrine wrote:
> > This is an interesting example:
> > <range><lt>1.1.2_1</lt></range>
> > <range><ge>2.0</ge></range>
> > Two range statements in the same package... instead of one range with
> > two operators. Why?
> Because they are two non-contiguous ranges and cannot be expressed by a
> single interval. The two are:
> x < 1.1.2_1
> 2.0 >= x
> or equivalently [0, 1.1.2_1) and [2.0, infinity).
> Hmm, re-reading what you wrote, it seems you want to think of it
> algorithmically. In that case, you could interpret each <range> element
> as containing expressions that should be ANDed (although the number and
> form of the expressions are constrained by the DTD), while multiple
> <range> elements in one <package> should be ORed.
I found an error in my tables.
I was relating a range to a name. That is incorrect.
A package may have many names. The ranges in a package relate to all
I've just changed my scipts and modified my DDL.
Dan Langille : http://www.langille.org/
BSDCan - The Technical BSD Conference - http://www.bsdcan.org/
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