XSD Restrictions

Restrictions declare the acceptable values for elements or attributes.

Number Range

 <xs:element name="level">
  <xs:simpleType>
    <xs:restriction base="xs:integer">
      <xs:minInclusive value="1"/>
      <xs:maxInclusive value="100"/>
    </xs:restriction>
  </xs:simpleType>
</xs:element>

xs:minExclusive, xs:maxExclusive can be used instead. (excluding the specified value itself)

Simple Type Declaration

The type can be declared by xs:simpleType and refered by an element or attribute.

 <xs:element name="level" type="levelType"/>
<xs:simpleType name="levelType">
  <xs:restriction base="xs:integer">
    <xs:minInclusive value="1"/>
    <xs:maxInclusive value="100"/>
  </xs:restriction>
</xs:simpleType>

Enumeration

 <xs:simpleType name="itemType">
  <xs:restriction base="xs:string">
    <xs:enumeration value="weapon"/>
    <xs:enumeration value="armor"/>
  </xs:restriction>
</xs:simpleType>

Regular Expression (xs:pattern)

 <xs:simpleType name="lowerCaseString">
  <xs:restriction base="xs:string">
    <xs:pattern value="[a-z]*"/>
  </xs:restriction>
</xs:simpleType>

String Length

 <xs:simpleType name="id">
  <xs:restriction base="xs:string">
    <xs:minLength value="4"/>
    <xs:maxLength value="16"/>
  </xs:restriction>
</xs:simpleType>

xs:length specifies minLength and maxLength as the same value.

Whitespace

 <xs:simpleType name="id">
  <xs:restriction base="xs:string">
    <xs:whitespace value="collapse"/>
  </xs:restriction>
</xs:simpleType>

• preserve : preserve white space characters
• replace : replace tabs, line feeds, carriage returns with space characters.
• collpase : remove tabs, line feeds, carriage returns, space characters except for space characters between other characters.

Other Restrictions

• xs:totalDigits : the number of digits (greater than 0)
• xs:fractionDigits : the number of decimal places (greater than or equal to 0)