The xsd:simpletype element

• The base attribute specifies the type it's derived from

• The name attribute specifies the name it will be referred to as

• The pattern child element imposes the restriction

  <xsd:simpleType base="xsd:string" name="money">
    <xsd:pattern value="\p{Sc}\p{Nd}+(\.\p{Nd}\p{Nd})?"/>
  </xsd:simpleType>