<gml:GridEnvelope> <gml:low>{1,1}</gml:low> <gml:high>{1,1}</gml:high> </gml:GridEnvelope>
<element name="GridEnvelope" type="gml:GridEnvelopeType"/>
<complexType name="GridLimitsType"> <sequence> <element name="GridEnvelope" type="gml:GridEnvelopeType"/> </sequence> </complexType>