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Re: are multiple predicates same as boolean and

Subject: Re: are multiple predicates same as boolean and
From: "Vasu Chakkera" <vasucv@xxxxxxxxx>
Date: Fri, 21 Nov 2008 14:39:04 +0000
Re:  are multiple predicates same as boolean and
> I think yes ...

If that were true, then the condition

myelement[@myattribute][1] should be same as
myelement[1][@myattribute], which is not true...

The predicate order is important

in a typical "and"

[a and b] = [b and a]


On Fri, Nov 21, 2008 at 1:34 PM, Mukul Gandhi <gandhi.mukul@xxxxxxxxx> wrote:
> Hi all,
>  Supposing I write following XPath expressions,
> 1) X[c1][c2]  or specifying generically, X[c1][c2][]...[cn]
> 2) X[c1 and c2]  or specifying generically, X[c1 and c2 ... and cn]
> c1, c2 etc. are boolean expressions.
> are the two forms (1 & 2) above exactly equivalent (i.e., will they
> return the same nodeset/sequence)?. I think yes ... but just wanted to
> confirm with the list.
> if 1 & 2 are exactly equivalent, then what could be the rule of thumb
> for using which form in certain scenarios?
> --
> Regards,
> Mukul Gandhi

Vasu Chakkera
Numerical Algorithms Group Ltd.

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