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Re: RELAX NG require oneOrMore optional elements

• From: Rick Jelliffe <rjelliffe@a...>
• To: XML Developers List <xml-dev@l...>
• Date: Wed, 16 Jul 2008 06:26:16 +1000

You can do it using two RELAX NG schemas. This sounds odd perhaps.

One schema is something like
   <oneOrMore>
           <choice> 
               <element name="child1"><text/></element>
               <element name="child2"><text/></element>
               ..
            </choice>
    </oneOrMore>

(There might be a simpler way to do this with wildcards rather than 
explicit naming.)

The other is
    <sequence>
         <optional>
               <element name="child1"><text/></element>
        </optional>
        <optional>
               <element name="child2"><text/></element>
        </optional>
               ...
    </sequence>

If you are using Schematron, just replace the first one by
   <rule context="parent" >
        <assert test="count(*) &gt; 0">
        The "parent" element should have at at least one child, for example
        child1, child2, ...
        </assert>
   </rule>

Cheers
Rick Jelliffe

• Follow-Ups:
  • Re: RELAX NG require oneOrMore optional elements
    • From: Frank Cusack <fcusack@r...>

• References:
  • RELAX NG require oneOrMore optional elements
    • From: Frank Cusack <fcusack@r...>