Error is here:
<wsdl:binding type="i0:Service_1_0" name="BasicHttpBinding_Service_1_0">
And
The binding element has two attributes - name and type.
The name attribute (you can use any name you want) defines the name of the binding, and the type attribute points to the port for the binding, in this case the "glossaryTerms" port.
So parser can't find port type="i0:Service_1_0"
, in this wsdl file there are two ports definition:
<wsdl:portType name="Service_1_0">
<wsdl:operation name="TrackShipments">
<wsdl:input name="ShipmentTrackingRequest" message="tns:ShipmentTrackingRequest" wsaw:Action="http://ws.aramex.net/ShippingAPI/v1/Service_1_0/TrackShipments"/>
<wsdl:output name="ShipmentTrackingResponse" message="tns:ShipmentTrackingResponse" wsaw:Action="http://ws.aramex.net/ShippingAPI/v1/Service_1_0/TrackShipmentsResponse"/>
</wsdl:operation>
</wsdl:portType>
<wsdl:service name="Service_1_0">
<wsdl:port name="BasicHttpBinding_Service_1_0" binding="i0:BasicHttpBinding_Service_1_0">
<soap:address location="http://ws.aramex.net/shippingapi/tracking/service_1_0.svc"/>
</wsdl:port>
</wsdl:service>
So now you know what is wrong(change type in wsdl:binding), and you can't pass the validation of that.