Question

Hey I was just going through some article on XML, I came across the following snippet of code

<xs:element name="shirtSize">
  <xs:simpleType>
    <xs:restriction base="xs:int">
      <xs:enumeration value="36"/>
      <xs:enumeration value="40"/>
    </xs:restriction>
  </xs:simpleType>
</xs:element>

I was wondering what base keyword means in the line

<xs:restriction base="xs:int">

Can anyone please explain me what it means??
Thanks

Answer 1

base is not, strictly speaking, a keyword. It is part of XML Schema (XSD) “language”, letting you create simple types by restricting other simple types, including built-in numeric types.

In your case, the integer value is restricted to two values – 36 and 40.