The Global Justice XML Data Model (Global JXDM) is an object-oriented data model for organizing the content of a data dictionary, the Global JXDD, in a database. From this database an XML schema specification can be generated that consistently represents the semantics and structure of common data elements and types required to exchange information within the justice and public safety communities. The first version (1.

object-oriented data model, database, and XML schema specification (generated from the database) that represent the semantics and structure of common data elements and types required to exchange information consistently within the justice and public safety communities.

Yes. The ultimate intent of the GXSTF is to establish a Global Justice Data Registry capability. This would provide a single logical point of access to all Global JXDM artifacts, including the Global JXDD content, the schema releases, IEPDs and their artifacts, tools, and additional capabilities. These may be stored in one repository or in multiple distributed networked repositories. The registry would be standards-based and present multiple interfaces (e.g.

In August 2002, the Global Justice Information Sharing Initiative (Global) Infrastructure and Standards Working Group (GISWG) formed the Global XML Structure Task Force (GXSTF) to identify data requirements, explore XML concepts, and apply XML best practices to design and implement the Global JXDM. The GXSTF is a working group composed of government and industry domain experts (from law enforcement, courts, corrections, etc.), technical managers, and engineers.

Global JXDM prereleases have four integers in their version numbering schemes, and include 3.0.0.0, 3.0.0.1, 3.0.0.2, and 3.0.0.3. All were released in 2003. For transitional reasons, prereleases 3.0.0.0, 3.0.0.1, and 3.0.0.3 will remain available for an undetermined period of time. Global JXDM prereleases are no longer updated or supported.

The Global JXDM Bugzilla-based Feedback Web site will continue to be the primary mechanism for identifying urgent bug fixes and requests for additions, deletions, and modifications. The GXSTF will continue to authorize all fixes and changes. Thus, all bug reports (feedback) will be reviewed and approved/disapproved by the GXSTF. All approved additions, deletions, and modifications will be applied to the next release whenever possible.

A Global JXDM component is any type or property defined in the model. Global JXDM types translate to XML Schema types and properties translate to XML schema elements or attributes.

Object classes are converted into XML Schema types. They represent a specific syntax and structure for a set of values. Properties are converted into XML Schema attributes and elements. They represent characteristics, or values of things. The Global JXDM is a reference model that is based on a class hierarchy of many specific objects (xsd:type) derived from one very general object (SuperType). Each object contains any number of properties (xsd:element or xsd:attribute).

Each release version has a distinct target namespace. The namespace for a given version is the URL "http://www.it.ojp.gov/jxdm/" concatenated with the version number "3.0.2" (for example). So, the namespace for release version 3.0.2 is http://www.it.ojp.gov/jxdm/3.0.2 This namespace is used for three purposes: (1) as an XML namespace, (2) for schema version control, and (3) to locate the distribution schemas and associated documentation.

Data components were built from approximately 35 data dictionaries, XML schema documents, and XML data models under development or in use around the justice and public safety communities. These sources yielded over 16,000 data components (elements, attributes, and types).

The Global JXDM adopts ISO/IEC Standard 11179, Specification and Standardization of Data Elements, Part 5. Names are composed of three basic parts: an object class term, a property term, and a representation term. However, in the Global JXDM the object class term represents the real world object. Each of these terms may be further supplemented with optional qualifier terms (usually adjectives), as required to clarify or focus semantic meaning.

The Global JXDM Viewer is now a functional capability contained within the SSGT. This search and navigational capability can be used to find Global JXDM components or browse the model. Note that the SSGT prototype is in spiral development. New capabilities, enhancements, and optimizations will be applied and made available as soon as they have been tested.

The first Global JXDM Developer's Workshop was held on the Georgia Tech Campus in Atlanta, Georgia on May 11-13, 2004 This three-day training event was recorded, and segments were made available on the OJP IT Initiatives Web site under the topic Global JXDM Developer's Workshop On-Line Training Materials. This resource contains streaming video sessions, slideshow presentations, and all training materials. Developer's Workshops are held periodically.

The Global JXDM is an object-oriented data model that specifies a representation structure for the Global JXDD. The Global JXDM (structure) and the Global JXDD (semantics) are integrated and implemented as a relational database. This database is used to generate a consistent representation in XML Schema.

Our intent is to publish new Global JXDM releases only as needed. To stay abreast of the latest information regarding the timing of a new release, refer to the OJP Information Technology Initiatives Web site or sign up for the Global JXDM Listserv. The releases (distribution schemas and documentation) can be downloaded or referenced using the URL that is the namespace of the version you need. Each version has a different target namespace distinguished by its three part version number.

These Reference elements exist to allow users with multiple occurences of the same information object in a schema or instance to reference a single content-filled object rather than repeat it in different locations. This ensures that the same information object does not repeat multiple times and mislead the receiver into thinking there are multiple (different) objects.

We have received reports that Apache Axis does not support the ID/IDREF used by the Global JXDM schemas to connect relationships in the model. XMLSpy is known to take a long time to fully validate files built with the Global JXDM schemas. However, the GXSTF has not seen it fail. Some developers have tried to use JAXB to compile the Global JXDM schemas into classes.

If you must use XMLSpy, do NOT use it for validation. XMLSpy demands too much overhead to load and examine imported and included files. The external schemas (such as NCIC-2000) are very large. If you want to use XMLSpy to view the model, then ensure you have unchecked (not checked) both options "Validate upon opening file" and "Validate upon saving file" in the Tools/Options/Files window.

Yes: Building Exchange Content Using the Global Justice XML Data Model: A User Guide for Practitioners and Developers. Other good sources of information are the Global JXDM Developer's Workshop On-line Training Materials that consist of all the presentations, training materials, and recorded audio/video streams from the first developer's workshop held at Georgia Tech in Atlanta, May 11-12, 2004.

There are over 40 projects using or committed to using the Global JXDM for their data exchange applications. If you are interested in collaborating or sharing experiences with any of these organizations, refer to the Organizations Utilizing the Global JXDM list.