ExpertGlossary terms starting with D

2,757 terms

data key A cryptographic key used for authentication or for encryption and decryption. [After X9.17]
data link The means of connecting one location to another for the purpose of transmitting and receiving data. [JP 1-02] 2.
data link connection identifier (DLCI) In frame-relay transmission systems, 13-bit field that defines the destination address of a packet. The address is local on a link-by-link basis.
data link escape character (DLE) A transmission control character that changes the meaning of a limited number of contiguously following characters or coded representations.
Data Link Layer See Open Systems Interconnection--Reference Model.
data logging The dating, time-labeling, and recording of data.
data loss The inability to take action to recover data. Data loss can be the result of transactions being copied that were lost when a failure occurred…
data management The control of data handling operations--such as acquisition, analysis, translation, coding, storage, retrieval, and distribution of data--but not…
Data Management Facility (DMF) Manages ARM datastream and provides for the collection, processing, analysis, and delivery of ARM data.
data management system See database management system.
Data Management System (DMS) Controls the data flow and minimizes data loss. Its primary functions are data collection, storage, and processing.
Data manipulation language (DML) SQL statements that can be used either interactively or within programming language source code to access and retrieve data stored in a database…
Data Mapping Going beyond basic search capabilities, data mapping is also called keyless searching.
data medium The material in or on which one or more characteristics of the material may be used to represent information statically or dynamically.
data migration process by which electronic data is copied from one medium format or one system to another, preserving its content and relationships so as to make it…
Data Mining Data mining generally refers to techniques for extracting summaries and reports from an organizations databases and data sets.
data mirroring See mirroring.
data mode In a communications network, the state of data circuit-terminating equipment (DCE) when connected to a communications channel and ready to transmit data…
data model The result of the conceptual design process. A generalized, user-defined view of the data related to applications.
Data Network Control Center (DNCC) or Equivalent Is the name used to describe the center which administers and maintains Data Networks (e.g., X.75 Gateways).
data network identification code (DNIC) In the ITU-T International X.121 format, the first four digits of the international data number, the three digits that may represent the data country…
data note A document in a Notes application.
data numbering plan area (DNPA) In the U.S. implementation of a ITU-T X.25 network, the first three digits of a network terminal number (NTN).
data object description The basic information, definitions, and metadata required to process "raw" measurement data to standard NetCDF files.
Data ONTAP A software product designed exclusively for NetApp appliances that optimizes file service by combining patented file-system technology and a microkernel…
data origin authentication Corroborating the source of data is as claimed. [INFOSEC-99]
data phase The phase of a data call during which data may be transferred between data terminal equipments (DTEs) that are interconnected via the network.
Data Pipeline A web service offered by Amazon which enables you to process and move data between different AWS services such as computing, storage and on-premise data…
Data Point In the context of hydrologic observations, a location on a river/stream for which observed data is input to RFC or WFO hydrologic forecast procedures, or…
data processing Handling and processing of information necessary to record the transactions of an organization.
data processing equipment Office equipment such as that using punched cards, punched tape, magnetic or other comparable storage media as an operating vehicle for recording and…
data protection The implementation of administrative, technical, or physical measures to guard against the unauthorized access to data. [2382-pt.8]
Data Provisioning Making data available when and where its needed and as it becomes available.
Data Quality Assessment Report (DQAR) An assessment report issued by the Data Quality Office and/or instrument mentors based on a data quality inspection.
Data Quality Health and Status (DQ HandS) The Data Quality Office website that displays automatically generated data quality results.
Data Quality Office (DQO) Formed in July 2000 to coordinate ARM's Data Quality Program.
Data Quality Problem Report (DQPR) An ARM infrastructure problem report issued to site operators by the Data Quality Office, instrument mentors, and/or site scientists to report a problem…
Data Quality Program Run by the ARM Program Data Quality Office to help coordinate the continued evolution and implementation of efforts to assure the quality of the data…
Data Quality Report (DQR) Used to identify and document problems with ARM systems, physical infrastructure, or instruments.
data range The period of time covered by records in a file.
data rate See data signaling rate.
data reconstitution A method of data restoration by assembling data from components available from alternative sources. [After 2382-pt.8]
data reconstruction A method of data restoration by analyzing original sources. [2382-pt.8]
data recoverability The ability to take action that results in data consistency, for example database rollback/roll forward recovery.
data recovery process of restoring information to active status from backup media of any type
data register See register.
data replication process of duplicating data between sites to enable the continued use of data
data restoration The act of regenerating data that have been lost or contaminated. Note: Methods include copying data from archive, data reconstitution from alternative…
data scrambler A device used in digital transmission systems to convert digital signals into a pseudorandom sequence that is free from long strings of simple patterns…
data security [The] protection of data from unauthorized (accidental or intentional) modification, destruction, or disclosure. [INFOSEC-99]
data separation The application of encryption as a means of access control. [After X9.69]
data service unit (DSU) A device used for interfacing data terminal equipment (DTE) to the public telephone network. 2.
data set A named or defined collection of data. See also Production Data Set and Privilege Data Set.
data signaling rate (DSR) The aggregate rate at which data pass a point in the transmission path of a data transmission system.
data signaling rate transparency See transparency.
data sink See sink.
data source Any repository of data from which documents can be retrieved, such as the Web, relational and nonrelational databases, and content management systems.
data source type A grouping of data sources according to the protocol that is used to access the data.
data station Data terminal equipment (DTE), data circuit-terminating equipment (DCE), and any intermediate equipment connected at one location.
data stream A sequence of digitally encoded signals used to represent information in transmission.
Data Streams Microsoft introduced a data storage concept called data streams in Windows NT version 3.51.
data structure How your various pieces of data relate to each other and what shape they make when you put them all together, as in a rectangular table or a…
data subscriber terminal equipment In the DDN, a general purpose terminal device that consists of (a) all the equipment necessary to provide interface functions, perform code conversion…
data switching exchange (DSE) The equipment installed at a single location to perform switching functions such as circuit switching, message switching, and packet switching.
data template A specified logical structure for a collection of data objects, including allowable ranges for their values and other data consistency specifications. [T1.
data terminal equipment See DTE.
Data Terms For definitions of terms used in the Ryan White Services Report (RSR) for reporting client level data, see the Data Dictionary.
data transfer device [A] fill device designed to securely store, transport, and transfer electronically both COMSEC and TRANSEC key, designed to be backward compatible with…
data transfer rate The average number of bits, characters, or blocks per unit time passing between corresponding equipment in a data transmission system.
data transfer request signal A call control signal transmitted by the data circuit-terminating equipment (DCE) to the data terminal equipment (DTE) indicating that a request signal…
data transfer time The time between (a) the instant at which a user data unit, such as a character, word, block, or message, is made available to a network for transfer by a…
data transmission The sending of data from one place to another by means of signals over a channel.
Data Transmission (107 Type) Test Line The term "Data Transmission (107 Type) Test Line" denotes an arrangement which provides for a connection to a signal source which provides test signals…
data transmission circuit The transmission media and the intervening equipment used for the transfer of data between data terminal equipments (DTEs).
data type The type of information that one field can store, for example, text, rich text, numbers, keywords, and time.
data unit A single kind of data for which the identification and description are identical for all occurrences. It may be a data element or a data composite. [T1.
data validation A process used to determine if data are accurate, complete, or meet specified criteria. [2382-pt.8]
Data Verification Assessment of data to ensure it has not been modified. The most common method of verification is hash coding by some method such as MD5.
data volatility Pertaining to the rate of change in the values of stored data over a period of time.
Data warehouse A collection of databases, data tables, and mechanisms to access the data on a single subject.
data-dependent protection The application of protective data elements to a data stream in such a manner that the composition of the data stream determines the amount or type of…
database In electronic records a database is a set of data elements consisting of at least one file, or of a group of integrated files, usually stored in one…
database cache A section of memory on an IBM® Lotus® Domino™ server where databases are stored for quick access.
Database Catalog A database containing information about databases stored on a single Domino server, a group of servers, or all the servers in a domain.
database design The formal process of analyzing facts about the real world into a structured database model.
DATABASE directory The same as the Library Reference workspace. It is the system directory that LIBRARIAN uses to manage information about a map library.
database engine The database software and version running on the DB instance.
database engineering The discipline involving (a) the conception, modeling, and creation, i.e., programming, of a database, (b) data analysis and administration of the…
database header An internal structure that stores database-wide information such as a time stamp that indicates when a database was first created or when the Fixup task…
Database integrator (DBI) ARC/INFO software's link to relational database management systems (RDBMS). DBI enables ARC/INFO users to access existing commercial databases and take…
Database layer An architectural layer of Active Directory that isolates the upper layers of the directory service from the underlying database system by exposing…
database library See application library.
database lock Locking is a mechanism by which database systems can prevent conflicting access to data when multiple users are making requests to the data.
database management system (DBMS) A software system used to access and retrieve data stored in a database.
database manager See application manager.
database name The name of a database hosted in a DB instance. A DB instance can host multiple databases, but databases hosted by the same DB instance must each have a…
database replica See replica.
database replication A software-based logical data replication scheme that is offered by most database vendors.
Database sample a sample obtained from an individual who is legally required to provide a DNA sample for databasing purposes and whose identity is established at the time…
Database-driven As in "database-driven web site." Means that the website is connected to a database and web page content is based in part on information extracted from…