xml schema elements same name nonetheless opposite sub-structure depending context

i try interpretation schema xml papers i receive.

the papers feeling like:

<root>
    <items>
        <group name="g-1">
            <item name="i-1"/>
            <item name="i-2"/>
            <item name="i-3"/>
            <item name="i-4"/>
        </group>
    </items>
    <data>
        <group name="g-1" place="here">
            <customer name="c-1">
                <item name="i-1" count="3"/>
                <item name="i-2" count="4"/>
            </customer>
            <customer name="c-2">
                <item name="i-3" count="7"/>
            </customer>
        </group>
    </data>
</root>

i attempted xmlspy xsd.exe .net 2.0. both combined schema definitions grant next <group> any array <item> <customer> elements. nonetheless i'm looking should shorten <group> next <items> <item> elements, <group> next <data> <customer> elements.

is something xml schema able during all?