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I am new to HL7 and the first thing that came to my mind was, why isn't this format using XML instead? There are a handful of parsers and there are some serious inconsistencies among vendors.
For those new to the health care software business I recommend this read http://www.interfaceware.com/hl7_version2x.html
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The HL7 Clinical Document Architecture (CDA) is an XML-based markup standard intended to specify the encoding, structure and semantics of clinical documents for exchange.
HL7 version 3 is using XML. Earlier versions of HL7 are a health care specific derivative of a pipe delimited format (IIRC its called ER7, not sure though).
The HL7 Standard is broadly divided into two categories – Version 2 (V2) and Version 3 (V3). The majority of HL7 messaging employs messages that use the 2.3 or 2.3. 1 versions of the standard.
"While v2 provides a 'negotiated framework' for developers to easily use and adapt, v3 was targeted to be a stricter standard that aimed to eliminate variances, in an effort to improve interoperability between all users of the standard," he said.
HL7 version 3 is using XML. Earlier versions of HL7 are a health care specific derivative of a pipe delimited format (IIRC its called ER7, not sure though).
Theres nothing particularly wrong with the pipe delimited format. In many ways the newer XML variations are harder to use. It may be old, but for the most part it works and it is well understood.
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