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Re: XML Schemas: Best Practices

• From: Eddie Robertsson <eddie@a...>
• To: Rick Jelliffe <ricko@a...>
• Date: Wed, 07 Mar 2001 11:00:43 +1100

Rick Jelliffe wrote:

That is an interesting paper.

I am surprised there is no treatment yet of the Extension framework that
Extensiblity developed. Also, Schematron does allow you to specify the
values of A and B, but in a separate section "diagnostics" which would
presumably appear in the appinfo for the top-level schema.

<sch:rule context="d:Demo">
   <sch:assert test="d:A > d:B" diagnostics="d1">Error!!!  A must be greater than B</sch:assert>
</sch:rule>

In the assert (or report) element you add the attribute diagnostics which is a reference to one or more diagnostic elements in a diagnostics section. In this case:

<sch:diagnostics>
   <sch:diagnostic id="d1">Value of A is <sch:value-of select="d:A"/> and value of B is <sch:value-of select="d:B"/>.</sch:diagnostic>
</sch:diagnostics>

Note, that the basic stylesheet (schematron-basic.xsl) doesn't support the diagnostics function however, it's easy to write your own stylesheet that extends skeleton1-5.xsl to support diagnostics [1].

[1] www.allette.com.au/Demo/XSD_Schtrn/schematron-basic-eddie.xsl

In order to use the diagnostics functionality you have to provide a command line argument diagnose=yes.

Cheers,
/Eddie

• References:
  • Re: XML Schemas: Best Practices
    • From: Rick Jelliffe <ricko@a...>

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