Tip

UDDI not a WSDL repository

It's a common misconception that a UDDI (Universal Description Discovery and Integration) registry provides a repository for WSDL documents, but in fact the UDDI spec has no direct knowledge of WSDL.

UDDI defines a relatively simple data model for capturing information about:

  • Service providers (businessEntity)
  • Services (businessService)
  • Service bindings (bindingTemplate)
  • Technical models and specifications (tModel)

UDDI also provides the means to categorize any information captured in the registry using name/value pairs (keyedReference).

This model is a general-purpose model that can capture information about any type of service, legacy application, specification or software asset. For example, you can register namespaces, schemas, element structures, XSLT stylesheets, UML models, components, even COBOL CopyBooks.

The OASIS UDDI-spec Technical Committee has published a technical note that defines a standard way to map information from a WSDL definition to this UDDI data model.

WSDL portTypes and bindings are registered as tModels. WSDL services are registered as businessServices, and WSDL ports are registered as bindingTemplates. The actual WSDL documents are not stored in the registry. The bindingTemplate points to the service access point, and you can usually find the service WSDL by appending ?wsdl to the endpoint URL. The tModels that represent the various WSDL artifacts will

    Requires Free Membership to View

also point to their associated WSDL documents. Keep in mind that if you are on the true path to SOA, then WSDL portTypes and bindings are reusable components and don't necessarily represent a single service.

The UDDI-spec TC has also defined standard mappings for BPEL4WS and ebXML. The TC is working on additional standard mappings.

About the author:
Anne Thomas Manes, Research Director at Burton Group, is a renowned technologist in the Web services space. Manes is also SearchWebServices.com's SOAP and WSDL expert. Be sure to read her past expert responses or pose a question of your own.


This tip originally appeared in a SOA Yahoo Groups posting.


This was first published in August 2005

There are Comments. Add yours.

 
TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:

Disclaimer: Our Tips Exchange is a forum for you to share technical advice and expertise with your peers and to learn from other enterprise IT professionals. TechTarget provides the infrastructure to facilitate this sharing of information. However, we cannot guarantee the accuracy or validity of the material submitted. You agree that your use of the Ask The Expert services and your reliance on any questions, answers, information or other materials received through this Web site is at your own risk.