json oData.request - Feed tag

I'm developing in SAPUI5 and making a oData.request I encounter a problem I can not solve: SAP expects the following XML:

<?xml version="1.0" encoding="UTF-8"?>
<atom:entry xmlns:atom="http://ift.tt/r5ut6F" xmlns:d="http://ift.tt/1cVQIMf" xmlns:m="http://ift.tt/1dtZymv">
    <atom:content type="application/xml">
        <m:properties>
            <d:Documenttype>DPD</d:Documenttype>
            <d:Statusextern>RE</d:Statusextern>
            <d:Documentcategorycode>1</d:Documentcategorycode>
            <d:LanguageIso_Doc>EN</d:LanguageIso_Doc>
            <d:Description>Prueba texto corto</d:Description>
            <d:ComputerAidedDesignDrawing>TRUE</d:ComputerAidedDesignDrawing>
        </m:properties>
    </atom:content>
    <atom:link rel="http://ift.tt/1zQ9pdZ" type="application/atom+xml;type=feed">
        <m:inline>
            <atom:feed>
                <atom:entry>
                    <atom:content type="application/xml">
                        <m:properties>
                            <d:Classtype>017</d:Classtype>
                            <d:Classname>CLDPD</d:Classname>
                        </m:properties>
                    </atom:content>
                </atom:entry>
            </atom:feed>
        </m:inline>
    </atom:link>
</atom:entry>

I perform this oData.request, but obtain an error because the second link need to be type feed width feed tags in xml, and i can't get it:

var sServiceUrl = "/sap/opu/odata/TENR/GW_DMS_01_SRV/";
var oModel = new sap.ui.model.odata.ODataModel(sServiceUrl, true);
sap.ui.getCore().setModel(oModel);
OData.request ({
    requestUri: "http://ift.tt/1zQ9rlW", 
    method: "POST", 
    headers: {
        "X-Requested-With": "XMLHttpRequest", 
        "Content-Type"    : "application/atom+xml",
    },
    data: {
        Documenttype : "DPD",
        Statusextern : "RE",
        Documentcategorycode : "1",
        LanguageIso_Doc : "EN",
        Description : "Prueba desde UI5",
        ComputerAidedDesignDrawing: "TRUE",
        "ti_classallocations": {
            __metadata: {
                uri : "ti_classallocations",
            },
            Classtype: "017",
            Classname: "CLDPD",
         },
        },
    },
    function (data, response) {

    },
    function(err) { 
          alert(err.response.body);
        }
    );

The resultant XML is:

<?xml version="1.0" encoding="UTF-8"?>
<a:entry xmlns:a="http://ift.tt/r5ut6F" xmlns:d="http://ift.tt/1cVQIMf" xmlns:m="http://ift.tt/1dtZymv">
   <a:author>
      <a:name />
   </a:author>
   <a:content type="application/xml">
      <m:properties>
         <d:Documenttype>DPD</d:Documenttype>
         <d:Statusextern>RE</d:Statusextern>
         <d:Documentcategorycode>1</d:Documentcategorycode>
         <d:LanguageIso_Doc>EN</d:LanguageIso_Doc>
         <d:Description>Prueba desde UI5</d:Description>
         <d:ComputerAidedDesignDrawing>TRUE</d:ComputerAidedDesignDrawing>
      </m:properties>
   </a:content>
   <a:link href="ti_classallocations" rel="http://ift.tt/1zQ9pdZ" type="application/atom+xml;type=entry">
      <m:inline>
         <a:entry>
            <a:author>
               <a:name />
            </a:author>
            <a:id>ti_classallocations</a:id>
            <a:content type="application/xml">
               <m:properties>
                  <d:Classtype>017</d:Classtype>
                  <d:Classname>CLDPD</d:Classname>
               </m:properties>
            </a:content>
         </a:entry>
      </m:inline>
   </a:link>
</a:entry>

Someone could help me with this issue? I'm complicated with time to complete the development.