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RE: 11th hour datatype testing proposal

From: Howard Katz <howardk@fatdog.com>
Date: Wed, 13 Apr 2005 11:01:28 -0700
To: <andy.seaborne@hp.com>, "Eric Prud'hommeaux" <eric@w3.org>
Cc: <public-rdf-dawg@w3.org>
Message-ID: <JMEJKDCPGHHIANHOMPDBIECCCNAA.howardk@fatdog.com>

Hi Andy,

I've got an action on my plate ("HowardK to seek clarification on valueTesting w.r.t. differenced from XQuery") that's just the ticket I think. I've just been working with value testing for numerics and non-numerics in my XQuery implementation, so it's still fairly fresh in my mind. Hopefully w/in the next couple of days I'll be able to write that up. With any luck that should shed some comparative light on the subject.
Ta,
Howard


 > -----Original Message-----
 > From: public-rdf-dawg-request@w3.org
 > [mailto:public-rdf-dawg-request@w3.org]On Behalf Of Seaborne, Andy
 > Sent: Wednesday, April 13, 2005 9:16 AM
 > To: Eric Prud'hommeaux
 > Cc: public-rdf-dawg@w3.org
 > Subject: Re: 11th hour datatype testing proposal
 > 
 > 
 > 
 > Sorry if I'm behind here ....
 > 
 > Eric Prud'hommeaux wrote:
 > > I expect to do some worksmithing to clarify the semantics of types
 > > derived from decimal near [[
 > > 
 > > XML Schema [] defines a set of types derived from decimal: integer,
 > > nonPositiveInteger, negativeInteger, long, int, short, byte,
 > > nonNegativeInteger, unsignedLong, unsignedInt, unsignedShort,
 > > unsignedByte and positiveInteger. These are all treated as decimals
 > > for computing effective boolean values.
 > > ]]
 > > 
 > > Other than that, I think that section 11 is reasonably implementable
 > > and somewhat readable. Howard has given it a brief sanity check and
 > > supplemented my understanding of how XQuery does numeric comparison.
 > 
 > I woudl be really, really grateful to Howard for such an 
 > explaination or some 
 > pointers.  We might even want a (non-normative) guide in rq23.
 > > 
 > > I have a few relevent tests to help the WG decide if this is a good
 > > idea (vs. the more computationlly intensive and scarier space of
 > > numbers being equivilent in the FILTER when they weren't in the
 > > graph match).
 > > 
 > > whether different datatypes restricted from decimal have the same
 > > value (I said "no"):
 > > 
 > http://dev.w3.org/cvsweb/perl/modules/W3C/Rdf/test/SPARQL-DT-0-al
 > g.sh?rev=HEAD&content-type=text/x-cvsweb-markup
 > 
 > Is there a missing "not both" somewhere as in "not both 
 > restricted from decimal"?
 > 
 > Things restricted from decimal do have the same value but this 
 > test isn't about 
 > that - it xsd:int and xsd:float (which is not from decimal).
 > 
 > > 
 > > whether known datatypes restricted from decimal can be cast to an
 > > equivalent values (I said "yes"):
 > > 
http://dev.w3.org/cvsweb/perl/modules/W3C/Rdf/test/SPARQL-DT-1-alg.sh?rev=HEAD&content-type=text/x-cvsweb-markup

This test is about int and float again.

What's "sameAs" exactly?

> 
> whether non-0 datatypes restricted from decimal have an ebv of true.
> (I said "yes"):
> http://dev.w3.org/cvsweb/perl/modules/W3C/Rdf/test/SPARQL-DT-2-alg.sh?rev=HEAD&content-type=text/x-cvsweb-markup
> 
> whether uncastables yield an error. (I said "yes"):
> http://dev.w3.org/cvsweb/perl/modules/W3C/Rdf/test/SPARQL-DT-3-alg.sh?rev=HEAD&content-type=text/x-cvsweb-markup

Agreed.

	Andy
Received on Wednesday, 13 April 2005 18:01:51 GMT

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