XML Schema: Element that can contain elements or text?

Question

How would I define an element that can either contain plain text or contain elements? Say I wanted to somehow allow for both of these cases:

<xs:element name="field">     <xs:complexType>         <xs:sequence>             <xs:element ref="subfield" minOccurs="0" maxOccurs="unbounded" />         </xs:sequence>         <xs:attribute name="name" type="xs:string" />     </xs:complexType> </xs:element>  <xs:element name="field" type="xs:string" /> 

... so that both these elements would be valid:

<field name="test_field_0">     <subfield>Some text.</subfield> </field>  <field name="test_field_1">Some more text.</field> 

Answer 1

I did some research on this a while ago and the only solution I found was to used the mixed attribute:

<xs:element name="field">     <xs:complexType mixed="true">         <xs:sequence>                 <xs:element ref="subfield" minOccurs="0" maxOccurs="unbounded" />         </xs:sequence>         <xs:attribute name="name" type="xs:string" />     </xs:complexType> </xs:element> 

This sadly also allows

<field name="test_field_0">     Some text I'm sure you don't want.     <subfield>Some text.</subfield>     More text you don't want. </field> 

Hopefully someone will give a better answer.