Operating Systems: i5/OS
             Personalize the table of contents and search results

 

Overview of the V3 UDDI registry

 

The Universal Description, Discovery, and Integration (UDDI) specification defines a way to publish and discover information about Web services. The term Web service describes specific business functionality that is exposed by a company, usually through an Internet connection, to allow another company, its subsidiaries, or a software program, to use the service.

You can find the UDDI specification on the OASIS UDDI Web page.

The UDDI specification defines a standard for the visibility, reusability, and manageability that are essential for a Service Oriented Architecture (SOA) registry service.

The UDDI registry is a directory for Web services that is implemented using the UDDI specification. It is a component of WebSphere Application Server. A critical component of IBM's on-demand Service Oriented Architecture, the UDDI registry solves the problem of discovery of technical components for an enterprise and its partners by:

The following example shows how the UDDI registry can be used in a larger enterprise. A company has a legacy application that provides telephone numbers and human resources (HR) information about employees. This application is turned into a Web service and published to the registry. A developer in the same company wants to write an application for a procurement function that also needs to provide HR information to the supplier. The application needs to give the supplier access to the employee account codes after the employee provides a name or serial number. Before Web services, the developer might be in one of the following situations:

With UDDI, the developer can search for the Web service and reuse the existing technical component in their new application for the supplier in minutes. The developer saves time and gets the application running sooner, thereby increasing efficiency and saving the company time and money. The UDDI registry was the first V2 standard-compliant UDDI registry for private enterprise work. The UDDI registry in this version has the following characteristics:

 

What is new in UDDI V3

The main aspects of the UDDI V3 specification that are provided with this version of WebSphere Application Server are as follows:

Improved recognition of the importance of private UDDI registries

Private UDDI registries are registries that are installed, owned, managed, and controlled by a separate body such as a department within a company, a company, an industry consortium, or an e-marketplace.

Publisher-assigned keys

The publisher of a UDDI entity can specify its key, rather than the registry automatically assigning a unique key. This means that more human-friendly, URI-based keys can be used, and it makes it easier to manage multiple registries.

UDDI information model improvements

The UDDI data structures are extended, which improves the ability of UDDI to represent businesses and services through metadata.

Security enhancements

Digital signatures provide additional security. Each of the main UDDI entities can be digitally signed, which improves the integrity and trustworthiness of UDDI data.

Ownership transfer APIs

These APIs support the transfer of the ownership of a UDDI entity from one publisher to another.

UDDI policy

You can set policy to define the behavior of a UDDI registry and therefore recognize the different environments in which a UDDI registry is used.

HTTP GET support for UDDI entities

You can use HTTP GET to access XML representations of each of the UDDI data structures. This extends the HTTP GET service beyond the scope for discovery URLs in the UDDI V2 specification.

 

Additional UDDI registry capabilities

The V3 UDDI registry in this version of WebSphere Application Server provides the following capabilities that are additional to support for the UDDI Version 3 specification:

V2 UDDI inquiry and publish SOAP API compatibility

There is backward compatibility for the V1 and V2 SOAP inquiry and publish APIs.

UDDI administrative console extension

The WebSphere Application Server administrative console includes a section that administrators can use to manage UDDI-specific aspects of their WebSphere environment. This management includes the ability to set defaults for initialization of the UDDI node, such as its node ID, and to set the UDDI V3 policy values.

UDDI registry administrative interface

The JMX administrative interface enables administrators to manage UDDI-specific aspects of the WebSphere environment programmatically.

Multidatabase support

The UDDI data is persisted to a registry database. The following database products that are supported by WebSphere Application Server are also supported for use as the persistence store for the UDDI registry. For specific details on supported levels, see Detailed system requirements page.

User-defined value set support

You can create your own categorization schemes or value sets. These are in addition to the standard schemes, such as North American Industry Classification System (NAICS), that are provided with the UDDI registry.

UDDI utility tools

You can use UDDI utility tools to import or export entities that use the UDDI V2 API.

UDDI user interface

The UDDI user console supports the UDDI V3 inquiry and publish APIs.

UDDI V3 client

The Java client for UDDI V3 handles the construction of raw SOAP requests for the client application. It is a JAX-RPC client and uses Version 3 data types, which are generated from the UDDI V3 Web Services Description Language (WSDL) and schema. These data types are serialized or deserialized to the XML, which constitutes the raw UDDI requests.

UDDI V2 clients

The following clients for UDDI V2 requests are provided:



 

Related tasks


Using the UDDI registry