 - A UUID (Universal Unique Identifier) is a 128-bit number used to uniquely identify some object or entity on the Internet. Depending on the specific mechanisms used, a UUID is either guaranteed to be different or is, at least, extremely likely to be different from any other UUID generated until 3400 A.D. The UUID relies upon a combination of components to ensure uniqueness. A guaranteed UUID contains a reference to the network address of the host that generated the UUID, a timestamp (a record of the precise time of a transaction), and a randomly generated component. Because the network address identifies a unique computer, and the timestamp is unique for each UUID generated from a particular host, those two components should sufficiently ensure uniqueness. However, the randomly generated element of the UUID is added as a protection against any unforseeable problem.
A UUID is specified as part of the tModel data structure, which
represents a service type (a generic representation of a registered service) in the UDDI (Universal Description, Discovery, and Integration) registry. This mechanism is used to discover Web services.
UUIDs could be generated to refer to almost anything imaginable. Microsoft and some other software companies refer to GUIDs (global unique identifiers), a type of UUID used to refer to Component Object Module objects and other software components. The first UUIDs were created in the Network Computing System (NCS), and subsequently became a component of the Distributed Computing Environment (DCE) of the Open Software Foundation (OSF).
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Learn more about UDDI (Universal Description, Discovery and Integration) |
| Mule architect sees REST with Atom rising, UDDI fading: Dan Diephouse, the creator of XFire and software architect at MuleSource Inc., discusses the advantages in using REST and the Atom Publishing Protocol. |
| Boubez: SOA virtualization, SLAs and access control policy: WS-Policy for SOA is good to go but work remains to bring access control and service level agreement policy language specifications, says Toufic Boubez. |
| Anne Thomas Manes: Why SOA needs UDDI now: The original definition of Web services included SOAP, WSDL and UDDI, but the latter was often ignored. UDDI v3.0 is emerging as a key standard for SOA registry and repository. |
| Burton: IBM SOA registry/repository competes with UDDI: The good news is that IBM has produced a technologically solid registry/repository, says a Burton Group report, but the bad news is that it largely ignores UDDI. |
| Utterly UDDI: UDDI stands for Universal Description, Discovery and Integration. Learn all you ever needed to know about UDDI with our white papers, articles, news stories and expert responses. |
| Free UDDI advice: Got questions about UDDI? Systinet CTO Adam Blum is here to lend his expertise. Read his previous answers and pose your own UDDI question anonymously. |
| UDDI Crash Course: Need a quick knowledge fix on UDDI? This week we present UDDI articles, tutorials, examples, tips, tools, white papers, expert advice and more to pump up your UDDI know-how. |
| Divorcing SOA and Web services: Jason Bloomberg gives a history of the evolution of SOA and Web services and discusses the common misconception that they are the same thing. |
| Web Services, Portlets and WSRP: Web services have exploded into many application realms. In this tip, Daniel Rubio explores how portlets have become a popular choice for Web-based applications. |
| LAST UPDATED: |
22 Apr 2003
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