"The pattern of finding all implementations of a Web service interface and possibly invoking those service instances proves useful in other contexts as well. Portal Websites still rely on manual—or semi-manual—compilation of news articles, automobile inventories, available hotel rooms, or airline seats. Even when data exchanges electronically, that automation often comes at the expense of lengthy and pricey system integration. Among the biggest motivations for building Web services is the desire to automate those tedious information-gathering tasks. This article provides a working example of how UDDI (Universal Description, Discovery, and Integration) registries, the Java API for XML Registries (JAXR), and the Web Services Description Language (WSDL) work together to initiate that automation."
"The standard defines an XML-based API with which clients access the registry. The open source UDDI4J project defines a Java API that provides access to any UDDI registry from within a Java application. UDDI4J lets you publish and find information in a UDDI registry by wrapping all the XML artifacts used by UDDI. It also handles the network access to a registry via the SOAP protocol, making it easy to integrate UDDI access into any new or existing Java application."
"UDDI: Universal Description, Discovery, and Integration, Part 3 This excerpt from O'Reilly's Java Web Services focuses on UDDI programming with the Java API for XML Registries."
"UDDI: Universal Description, Discovery, and Integration, Part 4 The final installment in an excerpt from Java Web Services, focusing on WSDL definitions using UDDI."
"The Universal Description, Discovery, and Integration (UDDI) Project provides a standardized method for publishing and discovering information about web services. The UDDI Project is an industry initiative that attempts to create a platform-independent, open framework for describing services, discovering businesses, and integrating business services. UDDI focuses on the process of discovery in the service-oriented architecture."
"Instances of these data structures are identified and referenced by a universally unique identifier, known as a UUID. UUIDs are assigned when the data structure is first inserted into the UUID registry. They are hexadecimal strings whose structure and generation algorithm is defined by the ISO/IEC 11578:1996 standard. This standard virtually guarantees the generation of a unique identifier by concatenating the current time, hardware address, IP address, and random number in a specific fashion. The Inquiry API uses the UUID to request a particular structure on demand."
"The key internationalization feature of UDDI Version 2 is its ability to support names and descriptions in various languages. For example, a restaurant service could be stored in multiple languages, such as "Restaurante" in Spanish, "Ristorante" in Italian, or "Gaststatte" in German. Of course, this allows local users to search in their native language. This feature becomes very important in the global Internet economy, where posting an advertisement in multiple languages may translate into more usage of that service."
"The UDDI registry is to Web services what a search engine is to Internet data. The power of a search engine comes from associated keywords described in a Web page. Similarly, a fine-grain search for a particular type of Web service is possible only if the service is classified properly. Classification and identification taxonomies present in UDDI constitute a starting point for describing Web services. Just as important to software developers is a means to efficiently classify their businesses in a registry."
