Accessing XML Nodes in Google Script

How about following sample script?

XmlService is used for this script. The detail information is https://developers.google.com/apps-script/reference/xml-service/xml-service.

Sample Script :

function sample() {
  var data = '\
    <records> \
      <record> \
        <f id="60"> \
        ANT708-1-BA-M110-001-IFC.PDF \
        <url> \
        https://hardermech.quickbase.com/up/bi8vxepu8/g/r9p6/eb6/va/ANT708-1-BA-M110-001-IFC.PDF \
        </url> \
        </f> \
        <f id="276">1</f> \
        <update_id>1496326605486</update_id> \
      </record> \
    </records>'

  var xml = XmlService.parse(data);
  var items = xml.getRootElement().getChild('record').getChildren('f');
  var res
  for (var i in items) {
    if (items[i].getAttribute('id').getValue() == 276) {
      res = items[i].getValue();
    }
  }
  Logger.log(res) // 1 is retrieved.
}

The value is in f of record. Since there are several f, it searches the attribute id as an array. And the result 1 is retrieved.

If I misunderstand your question, I'm sorry.