any element with another element within choice composes ambiguous content.
FYI, choice doesn't presume order within. The element with any element
should be positioned with sequence, or any element should have namespace
within choice if used with another element. e.g.

<choice>
<element name=name/>
<any namespace=namespace minOccurs=0/>
</choice>

Or

<sequence>
<element name=name/>
<any minOccurs=0/>
</sequence>

"Lev Dyadkin" <l.dyadkin@l...> wrote in message
news:uJlqboNeEHA.2440@t......
> Hi,
>
> The MSXML4 parser allows for <any> element to be the only one in <choice>
> element.  However, if it's not the only one, it declares the schema
illegal.
> For example, the following is legal:
>
> ...
>    <xs:element name="root">
>       <xs:complexType>
>          <xs:choice>
>             <xs:any minOccurs="0" processContents="skip"/>
>          </xs:choice>
>       </xs:complexType>
>    </xs:element>
> ...
> But the following is illegal:
> ...
>    <xs:element name="root">
>       <xs:complexType>
>          <xs:choice>
>             <xs:element name="a" type="aT"/>
>             <xs:any minOccurs="0" processContents="skip"/>
>          </xs:choice>
>       </xs:complexType>
>    </xs:element>
> ...
> Why?
>
> Thanks,
> Lev Dyadkin
>
>