These include the Standard Industrial Classification (SIC), the North American Industry Classification System (NAICS), or the United Nations Standard Products and Services Code (UNSPSC) and geographic taxonomies.
Because a single business may provide a number of services, there may be several Yellow Pages (each describing a service) associated with one White Page (giving general information about the business).
The service users or consumers can search web services manually or automatically.
The implementation of UDDI servers and WSIL engines should provide simple search APIs or web-based GUI to help find Web services.
Contact information for the business is also provided - for example the businesses address and phone number; and other information such as the Dun & Bradstreet.
Yellow pages provide a classification of the service or business, based on standard taxonomies.
UDDI is an open industry initiative, sponsored by the Organization for the Advancement of Structured Information Standards (OASIS), for enabling businesses to publish service listings and discover each other, and to define how the services or software applications interact over the Internet.
UDDI was originally proposed as a core Web service standard.
In the most basic scenario there is a Web Service Provider that publishes a service and a Web Service Consumer that uses this service.
Web Service Discovery is the process of finding suitable web services for a given task.