tokens: ['', '', 'GPRSCorrelationNumber', '', 'OCTET', 'STRING', 'SIZE', 'CorrelationValues', '', 'CHOICE', '', 'iritoCC', '', 'IRItoCCCorrelation', '', 'correlates', 'IRI', 'to', 'Contents', 'iritoiri', '', 'IRItoIRICorrelation', '', 'correlates', 'IRI', 'to', 'IRI', 'bothIRICC', '', 'SEQUENCE', '', '', 'correlates', 'IRI', 'to', 'IRI', 'and', 'IRI', 'to', 'Contents', 'iriCC', '', 'IRItoCCCorrelation', 'iriIRI', '', 'IRItoIRICorrelation', '', 'IMSVoIPCorrelation', '', 'SET', 'OF', 'SEQUENCE', '', 'imsiri', '', 'IRItoIRICorrelation', 'imscc', '', 'IRItoCCCorrelation', 'OPTIONAL', '', 'IRItoCCCorrelation', '', 'SEQUENCE', '', '', 'correlates', 'IRI', 'to', 'Content', 'cc', '', 'SET', 'OF', 'OCTET', 'STRING', 'correlates', 'IRI', 'to', 'multiple', 'CCs', 'iri', '', 'OCTET', 'STRING', 'OPTIONAL', '', 'correlates', 'IRI', 'to', 'CC', 'with', 'signaling', '', 'IRItoIRICorrelation', '', 'OCTET', 'STRING', '', 'correlates', 'IRI', 'to', 'IRI', 'GPRSEvent', '', 'ENUMERATED', '', 'pDPContextActivation', '', 'startOfInterceptionWithPDPContextActive', '', 'pDPContextDeactivation', '', 'gPRSAttach', '', 'gPRSDetach', '', 'locationInfoUpdate', '', 'sMS', '', 'pDPContextModification', '', 'servingSystem', '', '']