in file externalDataServerConnection.php, class ExternalDataServerConnection Class Description: The overarching class in the Distributed Data Management Client package (see package.php for documentation of the DDMS package.). This is the only class in the system that is directly used by the business application that uses the DDMS.
in file PhpUrlConnection.php, class PhpUrlConnection Class Description: Class representing a URL connection for posting and getting data to and from the DDMS server URL.