XML Schema-Required elements?

[SMerrill]

How do I create an element with required content?
That is,
<root>
<item>
<RequiredField></RequiredField>
<Name>A</Name>
</item>
<item>
<RequiredField>Value</RequiredField>
<Name>B</Name>
</item>
</root>

I want this to not validate, because the first item did not have any content.

 

[rac2]

Excellent question.

For string data types we can use <minLength value=&quot;1&quot;/>, but what about all the other datatypes?

<element name=&quot;RequiredField&quot;>
  <simpleType>
    <restriction base=&quot;string&quot;>
      <minLength value=&quot;1&quot;/>
    </restriction>
  </simpleType>
</element>

I tested this with MSXML 4 and xsv.

When the element is empty -

MSXML reports The element: '{urn:htd}RequiredField' has an invalid value according to its data type.

but xsv finds no errors.

 

[SMerrill]

Your answer yields a partial answer, and another follow-on question.
For a floating-point type, I would think that something in the following XSD specification would yield a required floating-point number, but I have not been successful in getting it to work:
[tt]
<xsd:element name=&quot;RequiredField&quot; nillable=&quot;false&quot;>
<xsd:simpleType>
<xsd:restriction base=&quot;xsd:float&quot;>
<xsdattern value=&quot;\p{N}&quot;/>
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
[/tt]
I know there are specifications within the xsdattern value attribute that indicate optional and required values.
Is there anyone out there who understands this attribute well enough to get it to work?
--Shaun