<element rngui:version="1.2" name="call" datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes" xmlns="http://relaxng.org/ns/structure/1.0" xmlns:rngui="http://rngui.org">
  <element name="_workorders">
    <zeroOrMore rngui:label="Create Work Order">
      <element name='_workorder'>
        <attribute name="label" rngui:label="Note">
          <data type="string"/>
        </attribute>
        <attribute name="duration" rngui:label="Duration">
          <data type="string"/>
        </attribute>
        <zeroOrMore rngui:label="Add Attachment">
          <element name='_attachment' rngui:label='Attachment'>
            <data type="string"/>
          </element>
        </zeroOrMore>
      </element>
    </zeroOrMore>
  </element>
</element>
