Difference between revisions of "HL7 V3 Datatypes Implementation Notes"
(New page: __TOC__ ==Introduction== This page provides some discussion about the HL7 V3 data types, and their XML representation. It is not constrained to a particular IHE profile, but it is hopeful...) |
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| − | The HL7 V3 data types are defined as abstract specification, part of the HL7 V3 standard. The current version is Release 1, with Release 2 being in the final stages of development. This discussion is strictly about Release 1 of the HL7 V3 data types. | + | The HL7 V3 data types are defined as an abstract specification, part of the HL7 V3 standard. The current version is Release 1, with Release 2 being in the final stages of development. This discussion is strictly about Release 1 of the HL7 V3 data types. |
The abstract data types specification defines the properties of the data types. The XML Implementable Technology Specification (XML ITS) defines how the data types are represented in XML. HL7 publishes XML schemas for the V3 data types, which express ''most'' of the properties defined in the abstract specification, however certain rules are impossible to define using the XML schema language. This is one of the reasons that the schemas published by HL7 are informative artifacts, and are not sufficient to implement the full semantics of the V3 data types. | The abstract data types specification defines the properties of the data types. The XML Implementable Technology Specification (XML ITS) defines how the data types are represented in XML. HL7 publishes XML schemas for the V3 data types, which express ''most'' of the properties defined in the abstract specification, however certain rules are impossible to define using the XML schema language. This is one of the reasons that the schemas published by HL7 are informative artifacts, and are not sufficient to implement the full semantics of the V3 data types. | ||
Revision as of 23:09, 25 November 2008
Introduction
This page provides some discussion about the HL7 V3 data types, and their XML representation. It is not constrained to a particular IHE profile, but it is hopefully useful to implementers of any CDA Release 2 based content profile, or any integration profile using HL7 V3 messages.
Background
The HL7 V3 data types are defined as an abstract specification, part of the HL7 V3 standard. The current version is Release 1, with Release 2 being in the final stages of development. This discussion is strictly about Release 1 of the HL7 V3 data types.
The abstract data types specification defines the properties of the data types. The XML Implementable Technology Specification (XML ITS) defines how the data types are represented in XML. HL7 publishes XML schemas for the V3 data types, which express most of the properties defined in the abstract specification, however certain rules are impossible to define using the XML schema language. This is one of the reasons that the schemas published by HL7 are informative artifacts, and are not sufficient to implement the full semantics of the V3 data types.
The schemas provided by HL7 are part of the V3 normative editions. The ones part of the 2008 Normative Edition are at ftp://ftp.ihe.net/TF_Implementation_Material/ITI/schema/HL7V3/NE2008/coreschemas/