Implement let

[zikkandev]

Hi,

Know that it's an old repo but would you consider implementing the let-element?

Regards,
Anders

[milo]

Hi,

never used that. I'll check the specification and let you know.

[Johan-Svensk]

Here's an example where it is used as a global variable (sorry about the formatting):

<schema xmlns="http://purl.oclc.org/dsdl/schematron">
 <ns uri="http://docbook.org/ns/docbook" prefix="db"/>
 <let name="globalVar" value="/db:article/descendant::db:keyword//@xml:id"/>
 <pattern id="Overview">
   <rule id="one" context="/db:article/db:section[@xml:id='overview']/db:section[@xml:id='product_info']">
      <assert test="$globalVar = 'x' or $globalVar = 'y'" role="error">"<value-of select="$globalVar"/>" is invalid</assert>
    </rule>
 </pattern>
</schema>

[milo]

Thanks for the example. I'll try to implement it next week.

[rahal]

It's not a full support (it doesn't support global lets, but only lets inside a rule tag), but it's a start :
#5