xs:extension problem

[SL33PY]

Hi again,

I feel like I'm spamming the place, but these are all the things that I encounter during work.
Anyways:
I made a base complex type:

<xs:complexType name="BaseLocationType">
        <xs:sequence>
            <xs:element name="Path" type="xs:string" maxOccurs="1" minOccurs="1" />
            <xs:element name="Files" type="xs:string" minOccurs="0" maxOccurs="1" />
        </xs:sequence>
    </xs:complexType>

Which I want to extend to define other more specific locations. Like for example:

<xs:complexType name="LocalDiskType">
        <xs:complexContent>
            <xs:extension base="BaseLocationType">
                <xs:sequence>
                    <xs:element name="Drive" type="xs:string" minOccurs="1" maxOccurs="1" />
                </xs:sequence>
            </xs:extension>
        </xs:complexContent>        
    </xs:complexType>

This means that I'm defining my second type and it is derived from my first type. It only adds another element to the type (beeing <Drive>)

If I'm doing something wrong here or if my logic is false, please tell me.

But as far as I can interprete the documentation that I read this should work. This would also imply that I can use this element as follows:

<Location>
    <LocalDisk>
        <Path></Path>
        <Drive>C</Drive>
    </LocalDisk>
</Location>

Were it not that VS 2003 gives me an error on path, because it's not defined in my xsd according to VS2003.

BUT! Very important! If I leave the <Path> tag out, VS2003 complains because it was expecting a <Path> tag.

I don't know why he does that, but I would love to have a solution that is clean.

Greetings,
- SL33PY