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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> 
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A complex element is an XML element that contains other elements and/or attributes.
Explanation: Simple type element is used only in the context of the text.
An XML schema describes the coarse shape of the XML document, what fields an element can contain, which sub elements it can contain etc, it can also describe the values that can be placed into any element or attribute.
A simple element is an XML element that does not have any attributes or any sub (child) elements. A simple element can be declared with a simple datatype. What is a complex element? A complex element is an XML element that have at least one attribute, or at least one sub (child) element.
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.
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