# WADL API Reference
source: https://developer.mastercard.com/mastercard-gateway/documentation/testing/wadl-api-ref/index.md

WADL API referemce for Gateway Dircet API RESTful web services.

```xml
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://wadl.dev.java.net/2009/02" targetNamespace="http://wadl.dev.java.net/2009/02" elementFormDefault="qualified">
    <xs:import namespace="http://www.w3.org/XML/1998/namespace" schemaLocation="http://www.w3.org/2001/xml.xsd"/>
    <xs:element name="application">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:grammars" minOccurs="0"/>
                <xs:element ref="tns:resources" minOccurs="0" maxOccurs="unbounded"/>
                <xs:choice minOccurs="0" maxOccurs="unbounded">
                    <xs:element ref="tns:resource_type"/>
                    <xs:element ref="tns:method"/>
                    <xs:element ref="tns:representation"/>
                    <xs:element ref="tns:param"/>
                </xs:choice>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
    <xs:element name="doc">
        <xs:complexType mixed="true">
            <xs:sequence>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="title" type="xs:string"/>
            <xs:attribute ref="xml:lang"/>
            <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:element name="grammars">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element minOccurs="0" maxOccurs="unbounded" ref="tns:include"/>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
    <xs:element name="resources">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:resource" maxOccurs="unbounded"/>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="base" type="xs:anyURI"/>
            <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:element name="resource">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:param" minOccurs="0" maxOccurs="unbounded"/>
                <xs:choice minOccurs="0" maxOccurs="unbounded">
                    <xs:element ref="tns:method"/>
                    <xs:element ref="tns:resource"/>
                </xs:choice>
                <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other" processContents="lax"/>
            </xs:sequence>
            <xs:attribute name="id" type="xs:ID"/>
            <xs:attribute name="type" type="tns:resource_type_list"/>
            <xs:attribute name="queryType" type="xs:string" default="application/x-www-form-urlencoded"/>
            <xs:attribute name="path" type="xs:string"/>
            <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:simpleType name="resource_type_list">
        <xs:list itemType="xs:anyURI"/>
    </xs:simpleType>
    <xs:element name="resource_type">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:param" minOccurs="0" maxOccurs="unbounded"/>
                <xs:choice minOccurs="0" maxOccurs="unbounded">
                    <xs:element ref="tns:method"/>
                    <xs:element ref="tns:resource"/>
                </xs:choice>
                <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##other" processContents="lax"/>
            </xs:sequence>
        <xs:attribute name="id" type="xs:ID"/>
        <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:element name="method">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:request" minOccurs="0"/>
                <xs:element ref="tns:response" minOccurs="0" maxOccurs="unbounded"/>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="id" type="xs:ID"/>
            <xs:attribute name="name" type="tns:Method"/>
            <xs:attribute name="href" type="xs:anyURI"/>
            <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:simpleType name="Method">
        <xs:union memberTypes="tns:HTTPMethods xs:NMTOKEN"/>
    </xs:simpleType>
    <xs:simpleType name="HTTPMethods">
        <xs:restriction base="xs:NMTOKEN">
            <xs:enumeration value="GET"/>
            <xs:enumeration value="POST"/>
            <xs:enumeration value="PUT"/>
            <xs:enumeration value="HEAD"/>
            <xs:enumeration value="DELETE"/>
        </xs:restriction>
    </xs:simpleType>
    <xs:element name="include">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
        <xs:attribute name="href" type="xs:anyURI"/>
        <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:element name="request">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:param" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:representation" minOccurs="0" maxOccurs="unbounded"/>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
        <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:element name="response">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:param" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:representation" minOccurs="0" maxOccurs="unbounded"/>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="status" type="tns:statusCodeList"/>
            <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:simpleType name="uriList">
        <xs:list itemType="xs:anyURI"/>
    </xs:simpleType>
    <xs:element name="representation">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:param" minOccurs="0" maxOccurs="unbounded"/>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="id" type="xs:ID"/>
            <xs:attribute name="element" type="xs:QName"/>
            <xs:attribute name="mediaType" type="xs:string"/>
            <xs:attribute name="href" type="xs:anyURI"/>
            <xs:attribute name="profile" type="tns:uriList"/>
            <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:simpleType name="statusCodeList">
        <xs:list itemType="xs:unsignedInt"/>
    </xs:simpleType>
    <xs:simpleType name="ParamStyle">
        <xs:restriction base="xs:string">
            <xs:enumeration value="plain"/>
            <xs:enumeration value="query"/>
            <xs:enumeration value="matrix"/>
            <xs:enumeration value="header"/>
            <xs:enumeration value="template"/>
        </xs:restriction>
    </xs:simpleType>
    <xs:element name="param">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:option" minOccurs="0" maxOccurs="unbounded"/>
                <xs:element ref="tns:link" minOccurs="0"/>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="href" type="xs:anyURI"/>
            <xs:attribute name="name" type="xs:NMTOKEN"/>
            <xs:attribute name="style" type="tns:ParamStyle"/>
            <xs:attribute name="id" type="xs:ID"/>
            <xs:attribute name="type" type="xs:QName" default="xs:string"/>
            <xs:attribute name="default" type="xs:string"/>
            <xs:attribute name="required" type="xs:boolean" default="false"/>
            <xs:attribute name="repeating" type="xs:boolean" default="false"/>
            <xs:attribute name="fixed" type="xs:string"/>
            <xs:attribute name="path" type="xs:string"/>
            <xs:anyAttribute namespace="##other" processContents="lax"/>    
        </xs:complexType>
    </xs:element>
    <xs:element name="option">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="value" type="xs:string" use="required"/>
            <xs:attribute name="mediaType" type="xs:string"/>
            <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
    <xs:element name="link">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="tns:doc" minOccurs="0" maxOccurs="unbounded"/>
                <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="resource_type" type="xs:anyURI"/>
            <xs:attribute name="rel" type="xs:token"/>
            <xs:attribute name="rev" type="xs:token"/>
            <xs:anyAttribute namespace="##other" processContents="lax"/>
        </xs:complexType>
    </xs:element>
</xs:schema>
```