XSD Element content and attributes
This is a problem I encountered whilst working on a configuration XSD at work, I wanted to have a node that had content, with an enforced type along with attributes. An example of the XML I wanted to allow is below.
<Quotes> <Quote author="George W. Bush">Rarely is the questioned asked: Is our children learning?</Quote> </Quotes>
To specify a type for the node contents as well as some attributes, we need to use a type extension, specifying the type we want for the content as the base type. This is shown below.
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="Quotes"> <xs:complexType> <xs:sequence> <xs:element name="Quote"> <xs:complexType> <xs:simpleContent> <xs:extension base="xs:string"> <xs:attribute name="author" type="xs:string" /> </xs:extension> </xs:simpleContent> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:schema>
The XSD above will permit the XML we want, and allow content and attributes on the same node. I'll probably do some more stuff on XSDs in the near future.