Search results
Results from the WOW.Com Content Network
An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).
goods, services or money, i.e., resources; business transactions or agreements that affect resources, i.e., events; people or other human agencies (other companies, etc.), i.e., agents; These objects contrast with conventional accounting terms such as asset or liability, which are less directly tied to real-world objects.
A sample Entity-relationship diagram using Chen's notation. A sample Entity-relationship diagram. A sample ER diagram. 한국어: ER 다이어그램 예제.
The enhanced entity–relationship (EER) model (or extended entity–relationship model) in computer science is a high-level or conceptual data model incorporating extensions to the original entity–relationship (ER) model, used in the design of databases.
It is a method to deliver a project in which the design and construction services are contracted by a single entity known as the design–builder or design–build contractor. It can be subdivided into architect-led design–build ( ALDB , sometimes known as designer-led design–build ) and contractor-led design–build .
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Code diagrams (level 4): provide additional details about the design of the architectural elements that can be mapped to code. The C4 model relies at this level on existing notations such as Unified Modelling Language (UML) , Entity Relation Diagrams (ERD) or diagrams generated by Integrated Development Environments (IDE) .
Example of a system context diagram. [1] A system context diagram in engineering is a diagram that defines the boundary between the system, or part of a system, and its environment, showing the entities that interact with it. [2] This diagram is a high level view of a system. It is similar to a block diagram.