How to access this method from WSDL?

Question

Hi,

I have made a vat checker based on this wsdl.It works fine.Now I want to access this part to check webservice status.

http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl

<xsd:simpleType name="matchCode"><xsd:restriction base="xsd:string"><xsd:enumeration value="1"><xsd:annotation><xsd:documentation>VALID</xsd:documentation></xsd:annotation></xsd:enumeration><xsd:enumeration value="2"><xsd:annotation><xsd:documentation>INVALID</xsd:documentation></xsd:annotation></xsd:enumeration><xsd:enumeration value="3"><xsd:annotation><xsd:documentation>NOT_PROCESSED</xsd:documentation></xsd:annotation></xsd:enumeration></xsd:restriction></xsd:simpleType>

I have already extracted wsdl.Couldnt find the method and usage.is there anyone who can point me out.
Thanks