I am stumped with what seems to be a simple question. Any help will be much appreciated.

 

I want to validate an XML file on few specific elements and ignore everything else. I am interested in only a section of the XML file. I have following constraint that I want to check:

 

Root element has 1 or more <content> element

 

Each <content> element has :

- Exactly one <ID>

- Exactly one <Code>

- Exactly one <Description>

- Exactly one <Purpose>

 

<content> element could have other elements, attributes, comments, etc. that I am not interested in.

 

Is there a simple way to express this.