XSD Empty Elements
An empty complex element cannot have contents, only attributes.
Complex Empty Elements
An empty XML element:
| <product prodid="1345" /> |
The "product" element above has no content at all. To define a type
with no content, we must define a type that allows elements in its content,
but we do not actually declare any elements, like this:
<xs:element name="product">
<xs:complexType>
<xs:complexContent>
<xs:restriction base="xs:integer">
<xs:attribute name="prodid" type="xs:positiveInteger"/>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
</xs:element> |
In the example above, we define a complex type with a complex content. The complexContent element signals that we intend to restrict or
extend the content model of a complex type, and the restriction of integer declares one attribute but does not introduce any element content.
However, it is possible to declare the "product" element more compactly, like this:
<xs:element name="product">
<xs:complexType>
<xs:attribute name="prodid" type="xs:positiveInteger"/>
</xs:complexType>
</xs:element> |
Or you can give the complexType element a name, and let the "product" element
have a type attribute that refers to the name of the complexType (if you use
this method, several elements can refer to the same complex type):
<xs:element name="product" type="prodtype"/>
<xs:complexType name="prodtype">
<xs:attribute name="prodid" type="xs:positiveInteger"/>
</xs:complexType> |
Whether you're new to XML or already an advanced user,
the user-friendly views and powerful entry helpers,
wizards, and debuggers in XMLSpy are designed to meet your XML
and Web development needs from start to finish.
New features in Version 2010!
- XML editor
- Graphical XML Schema / DTD editors
- XSLT 1.0/2.0 editor, debugger, profiler
- XQuery editor, debugger, profiler
- XBRL validator, taxonomy editor, taxonomy wizard
- Support for Office Open XML (OOXML)
- Graphical WSDL 1.1/2.0 editor & SOAP debugger
- JSON editing & conversion
- Java, C#, C++ code generation
- And much more!
Download a free trial today!
|
|
|
|
