XSD - Optional Integer

[Smeat]

Could someone please point me in the right direction.

I have an XSD file which declares an element of type Location:

<xs:element name="location">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="autologid" type="optionalIntType"/>
      <xs:element name="locationname" type="xs:string"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>

Note, the autologid element is of type optionalIntType which is intended to restrict values to integer types but allow empty values. I.e. an empty string or an integer.

<xs:simpleType name="optionalIntType">
  <xs:union memberTypes="xs:integer">
    <xs:simpleType>
      <xs:restriction base="xs:string">
        <xs:length value="0"/>
      </xs:restriction>
    </xs:simpleType>
  </xs:union>
</xs:simpleType>

Unfortunately when I run my XML through he XSD I get an exception:

Child node autologid below parent node location does not contain a value

Can anyone tell me how to declare my optionalIntType type so that it allows either an empty value or an integer please ?

Thanks
Smeat

 

[tsuji]

It looks like acceptable. What validation engine are we talking about?

 

[Smeat]

Hi tsuji

You are right.

The problem was in my validation logic.

Thanks for pointing that out

Smeat

 

[tsuji]

If you want to let the freedom of empty element as a proxy of value 0, you can use the attribute default to acheive that.
[tt] <xs:element name="autologid" type="xs:integer" default="0" />[/tt]
That looks simpler and even acheive a more definite functional purpose for applications implemented validation.