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Information Management's Glossary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

UDDI
Universal description, discovery and integration (UDDI) is a an online directory that gives businesses and organizations a uniform way to describe their services, discover other companies' services and understand the methods required to conduct business with a specific company.

Undo
Undo and rollback mean essentially the same: To rollback or undo a transaction prior to a commit of that transaction. (RDB term)


Unit of work consolidation
The process of consolidating multiple updates to a single row image into a single update.


Universe
A set that contains all elements relevant to a particular discussion or problem


Unplanned downtime
Unanticipated, duration-variable loss of computing-system usage due to natural disasters, power outages, hardware or software failures, and human error/intervention.


Unstructured data
Any document, file, image, report, form, etc. that has no defined, standard structure that would enable convenient storage in automated processing devices; it cannot be defined in terms of rows and columns or records, and the data cannot be examined with standard access. "Unstructured data is email, spreadsheets, documents and so forth. Some of the most valuable information in the corporation resides in unstructured data." - Bill Inmon


Update
Not allowed in a data warehouse.


Upsert
An "upsert" in the combination of an INSERT and UPDATE statement, built into a single clause. The usert model is especially useful in data warehouses where you need the following logic: IF FOUND THEN UPDATE ELSE INSERT; Upserts are great for processes that you normally require multiple insert as select statements IAS) statements. This is because upserts remove the need for row-at-a-time processing and enable the entire transaction as a single set.


URL
Uniform Resource Locator. The URL is the path information in an HTML coded source file used to locate another document or image. The format for the URL is scheme://host- domain[:port]/path/filename.


USD
User datagram protocol is a connectionless protocol that runs on top of IP networks.