HL7 is a set of standards for exchanging health information electronically. The standards define how information should be structured and formatted so that different systems can understand each other. HL7 interoperability refers to the ability of different systems to exchange HL7-formatted information.
The HL7 format is a data format used for exchanging medical information between different computer systems. The format is based on the Standard Generalized Markup Language (SGML), and it includes a series of tags that indicates the meaning of the data. The tags are used to identify the various parts of the message, and they also specify how the data should be formatted. The HL7 format is used by a variety of software applications, including electronic health records (EHRs), hospital management systems, and laboratory information systems. In addition, HL7 messages can be exchanged between different types of computer systems, making it possible to share medical information between different organizations.