#Introduction To ensure a consistent and structured approach for providing and sharing clinical information, the PCEHR system accepts only documents of supported HL7® Clinical Document Architecture (CDA®) structured document types.1

HL7® CDA® documents are XML documents deriving their machine-processable meaning from the HL7® Reference Information Model (RIM). They use the HL7® Version 3 Data Types.

The Clinical Document Data Extractor Library (previously called the CDA Extractor Library) uses the NEHTA CDA® Schema Extension and the relevant structured content specifications and CDA® implementation guides to extract the atomic data from level 3A and 3B CDA® documents built against the NEHTA specifications.

Content

The Clinical Document Data Extractor Library simplifies the development process by providing vendors with a simple interface for extracting data from a range of CDA® documents. The library uses the information from NEHTA-developed CDA® implementation guides. The Clinical Document Data Extractor Library can extract data from the following CDA® documents:

Continuity of Care

• eReferral
• Discharge Summary
• Event Summary
• Shared Health Summary
• Specialist Letter

Prescription and Dispense

• eHealth Prescription Record (previously called PCEHR Prescription Record)
• eHealth Dispense Record (previously called PCEHR Dispense Record)

The Clinical Document Data Extractor Library has the ability to extract data from the following sections within each of the CDA® documents listed. The data extracted is then presented back in a consistent format.

Sections	SHS	ES	REF	SL	DS	PR	DR
Adverse Reactions	X	X	X	X	X
Medications	X	X	X	X	X	X	X
Medical History	X	X	X	X	X
Immunisations	X	X

Project

This is a dotNet software library that aims to help extract structured data from Agency defined CDA documents.

Setup

• To build the distributable package, Visual Studio must be installed.
• Start up CdaExtractor.sln

Solution

The solution consists of several projects, however the main project is the CDAExtacror project. This project contains the code to generate and return a model with the extracted data in it.

Building and using the library

The solution can be built using 'F6'.

Library Usage

Documentation can be found in the sample project.

Licensing

See LICENSE file.