The simpleType Element
A simple type constrains the value of an attribute or an element in an
XML instance.
A simpleType element is the XML representation of a simple type.
All simple types are direct or indirect derivations of
built-in datatypes.
The following simple type specifies a value for a part number. Each part number
must conform to a pattern defined by a regular expression.
<xsd:simpleType name="partNumberType"
final="union"
id="catalog.partNumber.sType">
<xsd:annotation>
<xsd:documentation xml:lang="en">
Declaration of a part number.
Each part number consists of one to
three alphabetic characters followed by
one to eight digits. The following part
numbers, for example, are valid:
J1
ABC32897
ZZ22233344
</xsd:documentation>
</xsd:annotation>
<xsd:restriction base="xsd:token">
<xsd:pattern value="[A-Z]{1,3}\d{1,8}"/>
</xsd:restriction>
</xsd:simpleType>
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