Coolite 

<catalog>
  <plant>
    <common>Bloodroot</common>
    <botanical>Sanguinaria canadensis</botanical>
    <zone>4</zone>
    <colorCode>E7E7E7</colorCode>
    <light>Mostly Shady</light>
    <price>2.44</price>
    <availability>03/15/2006</availability>
    <indoor>true</indoor>
  </plant>
  <plant>
  ....
  </plant>
</catalog>

<catalog>
  <plant referenceKey="ADF63-A" price="2.44" colorCode="E7E7E7">
    <availability>03/15/2006</availability>
    <indoor>true</indoor>
    <zoneList>
        <zone>
            <id>5</id>
            <name>Europe</name>
        <zone>
        <zone>
            <id>3</id>
            <name>America</name>
        <zone>
    </zoneList>
  </plant>
  <plant>
  ....
  </plant>
</catalog>

<ext:Store runat="server" ID="Store1" AutoLoad="true">         
    <Proxy>
        <ext:HttpProxy runat="server" Url="../../Shared/Plants.xml" />
    </Proxy>
     <Reader>
            <ext:XmlReader Record="plant">
                <Fields>
                    <ext:RecordField Name="plant.price" Type="Float" />
                    <ext:RecordField Name="plant.referenceKey" Type="String" />
                    <ext:RecordField Name="plant.zoneList.zone[0].name" Type="String" />
                </Fields>
            </ext:XmlReader>
      </Reader>
</ext:Store>

<?xml version="1.0" encoding="utf-8"?>
    <catalog>
        <plant referenceKey="ADF63-A" price="2.44" colorCode="E7E7E7">
            <availability>03/15/2006</availability>
            <indoor>true</indoor>
            <zoneList>
                <zone id="1">
                    <id>5</id>
                    <name>Europe</name>
                    <zone>
                        <zone>
                            <id>3</id>
                            <name>America</name>
                        </zone>
                    </zone>
                </zone>
                <zone id="2">
                    <id>6</id>
                    <name>Europe1</name>
                    <zone>
                        <zone>
                            <id>3</id>
                            <name>America</name>
                        </zone>
                    </zone>
                </zone>
           </zoneList>
        </plant>
    </catalog>

<ext:Store runat="server" ID="Store1" AutoLoad="true">
        <Proxy>
            <ext:HttpProxy runat="server" Url="Plants.xml" />
        </Proxy>
        <Reader>
            <ext:XmlReader Record="plant">
                <Fields>
                    <ext:RecordField Name="referenceKey" Mapping="@referenceKey" />
                    <ext:RecordField Name="colorCode" Mapping="@colorCode" />
                    <ext:RecordField Name="price" Mapping="@price" Type="Float" />
                    <ext:RecordField Name="availability" Type="Date" />
                    <ext:RecordField Name="indoor" Type="Boolean" />
                    <ext:RecordField Name="zoneName" Mapping="zoneList/zone[id=1]/name"></ext:RecordField>
                </Fields>
            </ext:XmlReader>
        </Reader>
    </ext:Store>