All HL7® CDA® documents need to be packaged according to the packaging specification [CDAP] before they can be transmitted to the personally controlled electronic health record (PCEHR) system or P2P (provider to provider) with all referenced attachments and digitally signed by a NASH organisation certificate.

The Clinical Document Packaging Library (previously called the CDA Packaging Library) simplifies the development process by providing a sample implementation of how to package CDA® documents (and any attachments) following the NEHTA specifications. There are two specifications:

• a logical specification [CP] and;
• a technical specification [CDAP] with a number of profiles.

For PCEHR and P2P, Section 2.4 (“Signed CDA package”) of the technical specification is the only supported profile as per the Clinical Documents Common Conformance Profile [CCP], which simplifies any implementation as there is a consistent approach.

A CDA® package is a ZIP file which contains a number of files and directories that must exist.

This is a software utility library for creating CDA packages using the XDM profile using .NET.

This is documented in "A Basis Repository Interface for PCEHR and Wave Site SEHRs" solution design.

• To build and test the distributable package, Visual Studio must be installed.
• Load up the CDAPackage.sln solution file.
• For documentation on the CDAPackage library, refer to Help/Index.html.

The solution consists of three projects:

CDAPackage: The 'Nehta.VendorLibrary.CDAPackage' project contains the utility library for packaging CDA documents using the XDM profile.

CDAPackage.Sample: Sample code for the CDAPackage library.

Common: The 'Nehta.VendorLibrary.Common' project contains helper libraries common across all NEHTA vendor library components.

Nehta.Xsp: The 'Nehta.Xsp' project contains helper implementations of the Xml Secured Payload Profiles (XSPP).

An open source 3rd party zip library has been used in this project for the purposes of compressing files using the zip format. More information is available here: http://dotnetzip.codeplex.com/

The solution can be built using 'F6'.

Documentation can be found in the sample project.

See LICENSE file.