What is the difference between the Global Justice Information Exchange Data Model (GJXDM) and National Information Exchange Model (NIEM)?

The Global JXDM is unique within government as an XML vocabulary that has truly been created from the ground up. Practitioners from a variety of organizations came together to create a data dictionary that would allow the entire justice enterprise to share information with a common structure. This enables exchanges to be built that serve many purposes and eliminates the point-to-point inefficiencies of the past. The success of Global JXDM has standardized many disparate systems across the criminal justice domain and the concept is now being extended on a national level. Global JXDM will continue to operate under the guidance of DOJ Bureau of Justice Affairs (BJA), and NIEM will serve as an umbrella organization with a much larger scope. DOJ Office of the CIO is responsible for NIEM, in partnership with the DHS Office of the CIO.

In NIEM, the Global JXDM is represented in the justice domain. NIEM not only includes the justice domain, but also represents others, such as intelligence and emergency and disaster management. NIEM provides the organizations involved in these domains with the data model needed to create their information exchanges, to create and share information, and to get a head start in implementing its own exchanges. NIEM actively encourages Federal agencies while equally focusing on state and local contributors. This is possible through an emphasis on component-based resources that are reusable and portable to any organization or platform. NIEM will serve as an umbrella for existing domains, such as justice and homeland security, to work side by side in developing information exchange capabilities and ensure that technology will never again be a barrier to the public's safety and well being.

http://www.niem.gov