How can we mention the disk type[thin/thick] for a particular disk in the ovf file

in a ovf file we can mention

<Item>

        <rasd:AddressOnParent>1</rasd:AddressOnParent>

        <rasd:ElementName>Hard Disk 3</rasd:ElementName>

        <rasd:HostResource>ovf:/disk/vmdisk3</rasd:HostResource>

        <rasd:InstanceID>7</rasd:InstanceID>

        <rasd:Parent>2</rasd:Parent>

        <rasd:ResourceType>17</rasd:ResourceType>

        <vmw:Config ovf:required="false" vmw:key="backing.writeThrough" vmw:value="false"/>

      </Item>

can we add the disk type here?