It sounds like something like this:

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <xsd:element name="part">
      <xsd:complexType>
         <xsd:element ref="part" minOccurs="0" =
maxOccurs="unbounded"/>
         <xsd:attribute name="serial" type="xsd:string"/>
      </xsd:complexType>
   </xsd:element>
</xsd:schema>
 
Shlomo

________________________________

From: xmlschema-dev-request@w... on behalf of Todd Moon
Sent: Wed 5/16/2007 10:55 AM
To: xmlschema-dev@w...
Subject: Defining recursive elements?




I'm not sure if the subject is accurate, but I'm trying to author an
XSD that allows a certain complex type to be nested within itself to
an arbitrary depth.

A simple example would look like this:

<?xml version="1.0" encoding="utf-8" ?>
<part serial="00000001234">
  <part serial="00000001234">
    <part serial="00000001234">
    </part>
    <part serial="00000001234">
    </part>
    <part serial="00000001234">
      <part serial="00000001234">
      </part>
      <part serial="00000001234">
        <part serial="00000001234">
        </part>
      </part>
    </part>
  </part>
  <part serial="00000001234">
  </part>
</part>

Any "part" can contain any number of other parts.

Is it possible to validate this structure without putting an arbitrary
limit on the maximum depth?