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began as a simplified subset of the standard generalized markup language; XML’s
major purpose is to facilitate the exchange of structured data across different infor-
mation systems, especially via the Internet. It is considered an extensible language
because it permits its users to define their o wn elements allowing customization to
enable purpose-specific development. The structured documents technical committee
supports the HL7 mission through development of structured document standards for
health care (HL7, para. 21). HL7 also organizes, maintains, ...