Question

I’m putting together an xml schema for a simple xml (see bellow for both xml and schema). But I keep getting the following error with regards to the section node: “The element cannot contain white space. Content model is empty.” . Browsing the net I could not find any concise explanation as to what it means so I can fix it. Can anyone help?

Edit: thanks for all for offering help with the schema. I think it would help to have a concise description of what content model is and why it is empty here.

XML:

<config>
   <section name="facets">
      <facet type="format" label="Format" max="4"/>
      <facet type="language" max="4"/>
      <facet type="pubdate" max="6" submax="8"/> 
      <facet type="ice_topic" label="Fiction: Topic"/>
   </section>
</config>

Schema:

<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
   <xs:element name="config">
      <xs:complexType>
         <xs:sequence>
            <xs:element name="section" type="sectionBase"/>
         </xs:sequence>
      </xs:complexType>
   </xs:element>
   <xs:complexType name="sectionBase">
      <xs:attribute name="name" type="xs:ID"/>
   </xs:complexType>


   <xs:complexType name="sectionFacets" >
      <xs:complexContent>
         <xs:extension base="sectionBase">
            <xs:sequence>
               <xs:element name="facet" type="sectionFacetsBaseFacet"/>
            </xs:sequence>
         </xs:extension>
      </xs:complexContent>
   </xs:complexType>
   <xs:complexType name="sectionFacetsBaseFacet">
      <xs:attribute name="label" type="xs:ID"/>
      <xs:attribute name="max" type="xs:positiveInteger"/>
   </xs:complexType>
   <xs:complexType name="sectionFacetsFormat">
      <xs:complexContent>
         <xs:extension base="sectionFacetsBaseFacet"/>
      </xs:complexContent>
   </xs:complexType>
   <xs:complexType name="sectionFacetsPubdate">
      <xs:complexContent>
         <xs:extension base="sectionFacetsBaseFacet">
            <xs:attribute name="submax" type="xs:positiveInteger"/>
         </xs:extension>
      </xs:complexContent>

   </xs:complexType>
</xs:schema>

Answer 1

The label attribute of facet is set to xs:ID and this doesn’t allow spaces. You might want to use xs:string instead.