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Subject: Re: [codelist] Draft responses to 1st public review

Thanks for noting the typo.  What is ECF?

It's really not possible to validate the individual data values directly  
using the genericode Schema, because you are able to specify the data  
types for each column.  While it would be possible to add specialised and  
validated datatype-specific versions of the <SimpleValue> element, you  
couldn't check that the correct one had been used for each value, so the  
value would be limited (although it might have some use for hand-editing  
of genericode files, if anyone needs to do that).  This goes a bit against  
the "Occam's Razor" principle, of course.

What could be done, at least for those cases where Ken's Schematron  
approach is applicable, and where the datatype system is the W3C XML  
Schema datatypes, is to use XSLT to generate

* a custom Schema with datatyped column elements;
* a stylesheet to transform the genericode values into the custom format.

You would then transform and validate the values.  It's an ideal test case  
for the W3C's XProc spec.  Any data validation approach is going to have  
to do something like this, one way or another.  This is just one way.

Cheers, Tony.

On Thu, 09 Aug 2007 16:24:14 +0100, Harris, Jim <jharris@ncsc.dni.us>  

> This looks good to me. Only problem I saw was a typo on the third
> response bullet under 2.2 (looks like "not" should have been "note").
> Validation concerns expressed by Mr. Martin (2.3) are of interest to me.
> Ken helped introduce genericode and logic behind separate validation
> methodology (in this case using Schematron) to the ECF TC last week. The
> TC has not made any decisions regarding possible use of genericode in
> ECF specifications. However, there was concern expressed with benefits
> being outweighed by additional complexity. I'm not sure if this concern
> is because of the need for separate content validation, but it might be
> worth exploring the trade-offs.

Anthony B. Coates
Senior Partner
Miley Watts LLP
Experts In Data
UK: +44 (20) 8816 7700, US: +1 (239) 344 7700
Mobile/Cell: +44 (79) 0543 9026
Data standards participant: genericode, ISO 20022 (ISO 15022 XML),  

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