V
valid time
SEE time, valid.
validation
Determining and confirming that something satisfies or conforms to defined rules, business rules, integrity constraints, defined standards, etc. The system cannot perform any validating unless it first has a definition of the way things should be
validity
The degree to which data conforms to domain values and defined business rules. (Larry English, Information Quality, pg. 142)
value
- Generally, the amount or extent of a measurement of space, time or quantity.
- In data modeling, a data abstraction assigned to a single attribute representing a fact, which may be represented by an encoding of the value.
- Commonly, the relative worth, usefulness, desirability, or importance of something, expressed numerically, sometimes using monetary values.
value by area map
value chain
An end-to-end set of activities in support of customer needs, usually beginning with a customer request and ending with customer receipt of benefits. Also called value stream. SEE ALSO information value chain analysis; process.
variance
The amount of difference or distance between an expected result and an observed result.
vee diagram
SEE chart, vee diagram.
Venn diagram
SEE chart, Venn diagram.
veracity
The degree to which something is believed to be true.
verb
- In language, a word describing a process or activity that occurs, has occurred, or will occur.
- In data modeling, a predicate that implies a relationship between two (or more) objects or entities. It can be used to form an elementary fact sentence. (Everest 2010)
version
A specific modification of a basic object that shares the same identifier with other modified forms of the object. Supplementary version numbers or effective dates are often needed to uniquely identify an instance.
versioning
The unique identification and storage of multiple versions of an object.
vertical abstraction
vertical partitioning
Vertical retrace interval
The time it takes to redisplay updates to a screen - 1/60th of a second. Used in comparison to zero latency.
Very Large DataBase (VLDB)
Databases that pose unusual performance challenges due to their exceptional size.
Very Large Scale Integration (VLSI)
The process of combining transistor-based circuits to create integrated chips.
view
A presentation of a set of data from one or more physical tables as one logical table. A view can include some or all the rows and columns from each contributing table, and can be defined as the result table from a SELECT statement.
Virtual Reality Markup Language (VRML)
A tag language to describe a three-dimensional space in a tagged document.
Virtual Storage Access Method (VSAM)
A disk file storage management system invented by IBM.
visualization, compound
The use of multiple types of visualization formats in one display.
visualization, concept
Visual representation of qualitative concepts.
visualization, data
Visual representation of quantitative data in schematic form.
visualization, information
An interactive visual representation of data by transformation into an image that can be then manipulated.
visualization, metaphor
The positioning of information graphically using a secondary related framework to convey insight.
visualization, strategy
Use of complementary visual representations to enable development and communication of a strategy.
vocabulary
A collection of terms and concepts that have not necessarily been screened for duplication and ambiguity. SEE ALSO controlled vocabulary.
vocabulary management
A way to improve the effectiveness of information storage and retrieval systems, Web navigation systems, and other environments that seek to both identify and locate desired content via some sort of description using language. The primary purpose of vocabulary control is to achieve consistency in the description of content objects and to facilitate retrieval. (ANSI/NISO Z39.19-2005)
volatile
- Adjective. Subject to sharp, frequent, or regular changes.
- Adjective. Transient, not persistent.