U

UAN

Siebel s XML-centric, standards-based, vendor-independent application integration scheme.

UDDI

Standard for Web-based, electronic directories that contain detailed information about businesses, the services they provide (including Web services), and the means for utilizing these services.

UDDI Keys

Unique identifier assigned to each entity defined in a UDDI Registry.

UDDI Node

A software implementation that supports one or more of the APIs specified in the UDDI standard.

UDDI Operators

The companies ”IBM, Microsoft, SAP, and NTT Communications ”that at present, working collaboratively, host and maintain the UBR.

UDDI Registry

Actual implementation of a UDDI service made up of at least one UDDI node.

Universal Business Registry

Global public UDDI registry service, on the Web, that is open to all.

UNSPSC

U.N.-sponsored standard for product and service classification.

URI

Short strings that uniquely identify resources on the Web.

URL

Global addresses, based on URIs, used to identify Web pages and Web sites.

UUID

128-bit-long keys, generated using an amalgamation of hardware addresses, timestamps, and random seeds , which are used to uniquely identify resources over time and space.