entity set

См. также в других словарях:

• Entity-relationship model — A sample Entity relationship diagram using Chen s notation In software engineering, an entity relationship model (ERM) is an abstract and conceptual representation of data. Entity relationship modeling is a database modeling method, used to… …   Wikipedia

• Entity–attribute–value model — (EAV) is a data model to describe entities where the number of attributes (properties, parameters) that can be used to describe them is potentially vast, but the number that will actually apply to a given entity is relatively modest. In… …   Wikipedia

• Entity-attribute-value model — (EAV), also known as object attribute value model and open schema is a data model that is used in circumstances where the number of attributes (properties, parameters) that can be used to describe a thing (an entity or object ) is potentially… …   Wikipedia

• Entity classification election — For United States income tax purposes, a business entity may elect to be treated either as a corporation or as other than a corporation.[1] This entity classification election is made by filing Internal Revenue Service Form 8832. Absent filing… …   Wikipedia

• Entity-Level Controls — Accountancy Key concepts Accountant · Accounting period · Bookkeeping · Cash and accrual basis · Cash flow management · Chart of accounts  …   Wikipedia

• Set (mythology) — In Ancient Egyptian mythology, Set (also spelled Seth, Sutekh or Seteh) is an ancient god, who was originally the god of the desert, storms, and chaos. Because of the developments in the Egyptian language over the 3,000 years that Set was… …   Wikipedia

• Entity — An entity is something that has a distinct, separate existence, though it need not be a material existence. In particular, abstractions and legal fictions are usually regarded as entities. In general, there is also no presumption that an entity… …   Wikipedia

• Set notation — Sets are fundamental objects in mathematics. Intuitively, a set is merely a collection of elements or members . There are various conventions for textually denoting sets. In any particular situation, an author typically chooses from among these… …   Wikipedia

• set theory — the branch of mathematics that deals with relations between sets. [1940 45] * * * Branch of mathematics that deals with the properties of sets. It is most valuable as applied to other areas of mathematics, which borrow from and adapt its… …   Universalium

• Weak entity — In a relational database, a Weak Entity is an entity that cannot be uniquely identified by its attributes alone; therefore, it must use a foreign key in conjunction with its attributes to create a primary key. The foreign key is typically a… …   Wikipedia

• Special purpose entity — A special purpose entity (SPE) (sometimes, especially in Europe, special purpose vehicle or simply SPV) is a body corporate (usually a limited company of some type or, sometimes, a limited partnership) created to fulfill narrow, specific or… …   Wikipedia