What is the alternative keyword that can be used instead of xs:sequence if the the attribute is an object instead of an array

Following is the configuration for which I am trying to create a WADL

{
   "id": "ABCD",
   "type": "INBOUND",
   "subtype": "HTTPPUSH",
   "config": {
      "attributes": [
         {
            "name": "A",
            "type": "array",
            "attributes": [
               {
                  "name": "B",
                  "type": "array",
                  "attributes": [
                     {
                        "name": "C",
                        "type": "string"
                     }
                  ]
               }
            ]
         }
      ]
   }
}

When I try to achieve a configuration in which "attributes" is an array like the one that I specified above, The following WADL is generated

 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" attributeFormDefault="unqualified" elementFormDefault="qualified">
     <xs:element name="PostBody_ABCD">
        <xs:complexType>
           <xs:all>
              <xs:element name="transactionId" type="xs:string" />
              <xs:element name="data">
                 <xs:complexType>
                    <xs:sequence maxOccurs="50000" minOccurs="0">
                       <xs:element name="A">
                          <xs:complexType>
                             <xs:sequence>
                                <xs:element name="B">
                                   <xs:complexType>
                                      <xs:sequence>
                                         <xs:element name="C" type="xs:string" />
                                      </xs:sequence>
                                   </xs:complexType>
                                </xs:element>
                             </xs:sequence>
                          </xs:complexType>
                       </xs:element>
                    </xs:sequence>
                 </xs:complexType>
              </xs:element>
           </xs:all>
        </xs:complexType>
     </xs:element>
  </xs:schema>

but now if the type of attribute is an object

{
  "id": "ABCD",
  "type": "INBOUND",
  "subtype": "HTTPPUSH",
  "config": {
    "attributes": [{
        "name": "A",
        "type": "object",
        "attributes": 
           "name": "B",
             "type": "object",
             "attributes": 
                    "name": "C",
                    "type": "string"
}
    ]
  }
}

what will be the changes that will occur in the WADL document? My question in most simple way asks, if the attribute is of type object, then can "xs:sequence" be used or is there any other keyword that needs to be used in place of it?