xml:space

Attribute Group Information

Attributes

QName Type Fixed Default Use Inheritable Annotation
xml:space restriction of xs:token optional

Source 

<xs:attributeGroup name="space">
  <xs:attribute name="space" use="optional" form="qualified">
    <xs:simpleType>
      <xs:restriction base="xs:token">
        <xs:enumeration value="default"/>
        <xs:enumeration value="preserve"/>
      </xs:restriction>
    </xs:simpleType>
  </xs:attribute>
</xs:attributeGroup>