This Technical Specification specifies how medical waveforms,such as electrocardiogram,electroencephalogram,spirometry waveform,etc.,are described for interperability among healthcare information systems. This Technical Specification may be used with other relevant protocols,such as HL7,DICOM,ISO/IEEE 11073,and database management systems for each purpose. This is a general specification,so specifications for particular waveform types and for harmonization with DICOM,SCP-ECG,X73,etc. are not given. This Technical Specification does not include lower layer protocols for message exchange.For example,a critical real-time application like a patient monitoring system is out of scope and this is an implementation issue.