I tried doing a choice between all the possible combinations. Doesn't
work. Because at some stage I have to make a choice between the
element node(or dialog) with one data type and the element node (or
dialog) with another data type and XSD doesn't allow that.

Basically somewhere I would have to go

<choice>
   <element name="dialog" type="optional_transition"/>
   <element name="dialog" type="compulsory_transition"/>
</choice>

This doesn't work because the element name is the same. It can only
choose different elements, not different element types. Same goes for
<all> and all the other tags. There seems to be a choice for elements
themselves but not the element types.

Hmmmm....Bit of a non trivial restriction isn't it. Anyway, at least
now I know its not something i am overlooking.

Thanks again Stan.
 


"Stan Kitsis [MSFT]" <skits@m...> wrote in message news:<424da294$1@n...>...
> You can't do conditions like this in XML Schema.  You can try using a big 
> choice with all possible states
> 
> -- 
> Stan Kitsis
> Program Manager, XML Technologies
> Microsoft Corporation
> 
> This posting is provided "AS IS" with no warranties, and confers no rights.
> 
> 
> <chaitanyag@h...> wrote in message 
> news:1111469996.196709.56910@z......
> >A more challenging aspect of the problem:
> >
> > Lets modify the xml slightly
> >
> > <root>
> >  <dialog>
> >    <node>
> >      <description/>
> >      <config/>
> >      <log/>
> >      <transition/>
> >    <node>
> >  <transition/>
> >  <dialog>
> > <transition/>
> > <\root>
> >
> > I need a rule that says that its ok if a node doesn't have a transition
> > as long as the dialog or root has a transition (it is possible for all
> > 3 to have a transition, which is ok). Note that a root can contain many
> > dialogs and a dialog can contain many nodes.
> >
> > What i need is some sort of fall through/ sibling navigation, parent
> > navigation sort of command. How do I go about doing this in XSD?
> >