Thank you everyone for your help. Here is what I needed to do (a lot
simpler than I thought)... just add "targetNamespace" to the
definition for each XML schema document with a unique value.

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://Untitled8/in"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
   <xs:element name="base">
      <xs:complexType>
         <xs:attribute name="myNodeABC" type="xs:string"/>
         <xs:attribute name="myNodeXYZ" type="xs:string"/>
      </xs:complexType>
   </xs:element>
</xs:schema>
  
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="http://Untitled9/in"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">
   <xs:element name="base">
      <xs:complexType>
         <xs:attribute name="myNodeABC" type="xs:string"/>
         <xs:attribute name="myNodeXYZ" type="xs:string"/>
      </xs:complexType>
   </xs:element>
</xs:schema>

Thanks again.

Regards,
Gordon Dickens


------------------------------------------------------------------------
i.daneker@u... (Ingrid) wrote in message news:<f0e34f1.0408071006.120774bf@p...>...
> *************************************************************
> i.daneker@u... (Ingrid) wrote in message news:<f0e34f1.0408070345.653f3eef@p...>...
> > Re my answer below...
> > 
> > Even better than that:  SCHEMA 1 (Untitled8.xsd):
> > 
> > <?xml version="1.0" encoding="UTF-8"?>
> > <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
> > xmlns:in="http://www.w3.org/2001/XMLSchema"
> > elementFormDefault="qualified" targetNamespace="http://Untitled8">
> >    <-- <xs:import namespace="http://Untitled9/in"
> > schemaLocation="untitled9.xsd"></xs:import>-->
> >     <xs:element name="base">
> >         <xs:complexType>
> >             <xs:sequence>
> >                 <in:element name="base">
> >                 <in:complexType>
> >       <in:attribute name="myNodeABC" type="in:string"/>
> >       <in:attribute name="myNodeXYZ" type="in:string"/>
> >     </in:complexType></in:element>
> >             </xs:sequence>
> >             <xs:attribute name="myNodeABC"></xs:attribute>
> >             <xs:attribute name="myNodeDEF"></xs:attribute>
> >         </xs:complexType>
> >     </xs:element>
> > </xs:schema>
> > 
> > 
> > SCHEMA 2 (Untitled9.xsd):
> > 
> > <?xml version="1.0" encoding="UTF-8"?>
> > <in:schema xmlns:in="http://www.w3.org/2001/XMLSchema"
> >     targetNamespace="http://Untitled9/in"
> > elementFormDefault="qualified">
> >     <in:element name="base">
> >     <in:complexType>
> >       <in:attribute name="myNodeABC" type="in:string"/>
> >       <in:attribute name="myNodeXYZ" type="in:string"/>
> >     </in:complexType>
> >   </in:element>
> > </in:schema>
> > 
> > Resulting XML doc:
> > 
> > <?xml version="1.0" encoding="UTF-8"?>
> > <base xmlns="http://Untitled8"
> >      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> >      xsi:schemaLocation="http://Untitled8
> > file:/C:/Documents%20and%20Settings/Ingrid/Desktop/Untitled8.xsd"
> > myNodeABC="" myNodeDEF="">
> >     <base myNodeABC="" myNodeXYZ="">SCHEMA 2 content </base>
> > </base>
> > 
> > Ingrid
> > 
> > So the solution below is probably not strictly speaking the correct
> > way...
> > 
> > 
> > i.daneker@u... (Ingrid) wrote in message news:<f0e34f1.0408050656.3a688f28@p...>...
> > > Hi Gordon
> > > 
> > > Had a similar problem and it took me ages to sort something out (just
> > > writing a dissertation about DTD vs Schema use..)
> > > 
> > > This is what worked for me, but I am not an expert so my solution
> > > might not be how it should be done...
> > > 
> > > Sample Schema 1 (file: untitled8.xsd):
> > > 
> > > <?xml version="1.0" encoding="UTF-8"?>
> > > <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
> > > xmlns:in="http://www.w3.org/2001/XMLSchema"
> > > elementFormDefault="qualified">
> > >     <xs:import namespace="http://www.w3.org/2001/XMLSchema"
> > > schemaLocation="untitled9.xsd"></xs:import>
> > >     <xs:element name="base">
> > >         <xs:complexType>
> > >             <xs:sequence>
> > >                 <xs:element ref="in:base"></xs:element> 
> > >             </xs:sequence>
> > >             <xs:attribute name="myNodeABC"></xs:attribute>
> > >             <xs:attribute name="myNodeDEF"></xs:attribute>
> > >         </xs:complexType>
> > >     </xs:element>
> > > </xs:schema>
> > > which is your main Schema, note the <xs:import> tag, which references
> > > the location of your "to be imported" element (here in the same
> > > directory so just referenced "untitled9.xsd").  Also note above the
> > > <xs:import> - tag a new xmlns namespace abbreviation is introduced
> > > ie... xmlns:in - this is because I have given your second Schema a new
> > > namespace prefix (in)...:
> > > 
> > > Sample Schema 2:  This is the "to be imported" schema (my doc called
> > > untitled9.xsd - referenced in Schema 1 in the <xs:import> tag) with
> > > the new namespace prefix in:
> > > 
> > > <?xml version="1.0" encoding="UTF-8"?>
> > > <in:schema xmlns:in="http://www.w3.org/2001/XMLSchema"
> > >     targetNamespace="http://www.w3.org/2001/XMLSchema"
> > > elementFormDefault="qualified">
> > >     <in:element name="base">
> > >     <in:complexType>
> > >       <in:attribute name="myNodeABC" type="in:string"/>
> > >       <in:attribute name="myNodeXYZ" type="in:string"/>
> > >     </in:complexType>
> > >   </in:element>
> > > </in:schema>
> > > 
> > > The resulting XML instance document:
> > > 
> > > <?xml version="1.0" encoding="UTF-8"?>
> > > <base xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> > >     xsi:noNamespaceSchemaLocation="file:untitled8.xsd"
> > >     myNodeABC="" myNodeDEF="">
> > >     <base xmlns="http://www.w3.org/2001/XMLSchema" 
> > >     myNodeABC="" myNodeXYZ="">Content of base element of Schema 2
> > > nested in the base element of Schema 1 </base>
> > > </base>
> > > 
> > > By the way, I used the oXygen XML editor for this, for some reason
> > > Altova's XMLSpy">XMLSpy does not like my new namespace prefix... but oXygen
> > > validates it all..
> > > 
> > > Again, this might be complete gibberish but I hope it helps..
> > > 
> > > Cheers
> > > Ingrid
> > > 
> > > PS let me know what you think of it anyway, might be helpful for my
> > > dissertation to know if I am thinking on the right lines..And if you
> > > find an easier way to do it, could you please post it??
> > > 
> > > gdickens@c... (Gordon Dickens) wrote in message news:<8738a092.0408031840.8eaef70@p...>...
> > > > I have target xml to generate from schema.  All of the XML instances
> > > > have the same global element i.e. <base>.  I would like to combine all
> > > > of the schemas into a single schema where I could generate any of the
> > > > specific instances.
> > > > 
> > > > sample schema one:
> > > > <?xml version="1.0" encoding="UTF-8"?>
> > > > <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
> > > > elementFormDefault="qualified">
> > > >   <xs:element name="base">
> > > >     <xs:complexType>
> > > >       <xs:attribute name="myNodeABC" type="xs:string"/>
> > > >       <xs:attribute name="myNodeDEF" type="xs:string"/>
> > > >     </xs:complexType>
> > > >   </xs:element>
> > > > </xs:schema>
> > > > 
> > > > sample schema two:
> > > > <?xml version="1.0" encoding="UTF-8"?>
> > > > <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
> > > > elementFormDefault="qualified">
> > > >   <xs:element name="base">
> > > >     <xs:complexType>
> > > >       <xs:attribute name="myNodeABC" type="xs:string"/>
> > > >       <xs:attribute name="myNodeXYZ" type="xs:string"/>
> > > >     </xs:complexType>
> > > >   </xs:element>
> > > > </xs:schema>
> > > > 
> > > > Can anyone suggest how to join these two into a single schema where
> > > > the instance document does not have namespace prefixed
> > > > elements/attributes?
> > > > 
> > > > I tried attributeGroups, groups, import and include elements, without
> > > > any luck.
> > > > 
> > > > Any help is appreciated.
> > > > 
> > > > Thanks,
> > > > Gordon