MX 2.x)

A user-defined action that a client program (usually running on a workstation) requests from a server.

Transaction Management Facility (TMF)

A set of HP software products for NonStop systems that assures database integrity by preventing incomplete

updates to a database. It can continuously save the changes that are made to a database (in real time) and back

out these changes when necessary. It can also take online "snapshot" backups of the database and restore the

database from these backups.

trigger

A trigger defines a set of actions that are executed automatically whenever a delete, insert, or update operation

occurs on a specified base table.

Unicode

A character-coding scheme designed to be an extension of ASCII. By using 16 bits for each character (rather

than ASCII's 7), Unicode can represent almost every character of every language and many symbols (such as

"&") in an internationally standard way, eliminating the complexity of incompatible extended character sets and

code pages. Unicode's first 128 codes correspond to those of standard ASCII.

uniform resource locator (URL)

A draft standard for specifying an object on a network (such as a file, a newsgroup, or, with JDBC, a database).

URLs are used extensively on the World Wide Web. HTML documents use them to specify the targets of

hyperlinks.

URL

See uniform resource locator (URL).

virtual machine (VM)

A self-contained operating environment that behaves as if it is a separate computer. See also Java virtual

machine and Java Hotspot virtual machine.

World Wide Web (WWW)

An Internet client-server hypertext distributed information retrieval system that originated from the CERN High-

Energy Physics laboratories in Geneva, Switzerland. On the WWW everything (documents, menus, indexes) is

represented to the user as a hypertext object in HTML format. Hypertext links refer to other documents by their

URLs. These can refer to local or remote resources accessible by FTP, Gopher, Telnet, or news, as well as those

available by means of the HTTP protocol used to transfer hypertext documents. The client program (known as a

browser) runs on the user's computer and provides two basic navigation operations: to follow a link or to send a

query to a server.

WWW

See World Wide Web (WWW).

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