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Asked: 2026-05-10T20:16:27+00:00

I’m trying to add extra validation to jdpl process-definition files using XSD. We have

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I’m trying to add extra validation to jdpl process-definition files using XSD.

We have a couple of rules we want to add; but the one that’s causing me problems is that there must exist one ‘node’ element with it’s ‘name’ attribute = ‘Problem’.

so this is valid:

<process-definition name='sample'>     <node name='Problem'>     </node>     <node name='Do Work'>     </node> </process-definition>

and this isn’t

<process-definition name='sample'>     <node name='Do Work'>     </node> </process-definition>

So, to summarise, the rules I need to enforce are

  • node attribute having the value ‘Problem’
  • existence of 1 node with name=’Problem’
  • allowing any number of nodes with other names

Any ideas out there?

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1 Answer

  1. Sorry that’s not possible with XSD.

    Due to performance reasons XML-Schema is designed to never look ahead and never look back beyond the current node. That means that it must always be defined where the validator is in the schema-tree. And that makes requirements like this impossible to define with XSD.

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