XSD: default integer value range

问题

Is there an implied default value range when defining an element of a specific data type in an XSD file? For example if I define an element of type integer:

<xs:element name="MyIntegerElement" type="xs:integer"/>

Does this have an implied min and max value that it will validate to? I know I can explicitly define the valid ranges like so:

<xs:element name="MyIntegerElement">
   <xs:simpleType>
      <xs:restriction base="xs:integer">
         <xs:minInclusive value="1"/>
         <xs:maxInclusive value="16"/>
      </xs:restriction>
   </xs:simpleType>
</xs:element>

But if I don't do this when I validate an XML file against this will it default to a range of valid values? I've been digging around in the XSD documentation but haven't found the answer yet.

回答1:

Well, it depends on the data type...

If you look at the definition of integer at w3:

The value space of integer is the infinite set {...,-2,-1,0,1,2,...}

In essence it means that, for integers, by default there is no min/max value range since any integer can be represented.

On the other hand, for an int:

(...) maxInclusive to be 2147483647 and minInclusive to be -2147483648.

The list goes on for longs, shorts, etc...

You can read it in more detail here: http://www.w3.org/TR/xmlschema-2/#typesystem

来源：https://stackoverflow.com/questions/15486246/xsd-default-integer-value-range