UDDI is a web based distributed directory. It enables businesses to list themselves on internet and they also discover each other. It is similar to a traditional phone book’s yellow and white pages. Companies that use the UDDI protocol can extend their market reach and find new customers while also finding other businesses that offer useful services to them. Because UDDI uses a standard format for describing business services, it is easy to search and find useful services offered from other businesses.
A UDDI registration consists of three components:
White Pages — address, contact, and known identifiers.
Yellow Pages — industrial categorizations using the standard classifications.
Green Pages — technical information about services published by the business.
The Relation between WSDL and UDDI is shown in the Figure
