Logical Data Modeling - Primary Modeling Elements

Data System Architecture

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In data modeling, the primary elements are:

They are uniquely identifiable and therefore can be considered as resources.

They are identified with the help of a primary key or unique key





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Data System Architecture
How is used the name attribute in logical data modeling?

A name is a label attribute of an primary element. It's an identifier that specifies a unique key in a specific scope called a namespace. the name of file is unique in a directory. the name of...
Data System Architecture
Logical Data Modeling - Attribute

An attribute is a property or characteristic of a primary element (entity, relationship) one-to-one colorentity... The values for each attribute are defined in terms of properties. An attribute is...
Data System Architecture
Logical Data Modeling - Global Identifier (Fully Qualified Name, Canonical Form)

A global identifier identify uniquely a primary element (entity or relationship) in the global scope It's also generally known as: the fully qualified id the fully qualified name the canonical...
Data System Architecture
Logical Data Modeling - Identification

identification permits to identify a a primary element (ie an entity or a relationship) Some systems use the last four digits of a Social Security number as an authentication code, even though a Social...
Data System Architecture
Logical Data Modeling - Namespace (Hierarchical Entity Organization)

A namespace: is a space for a name is an element that contains a set of named element (ie element that can be identified by name) is a hierarchy relationship (tree) that provides organization capability...
Data System Architecture
Logical Data Modeling - Scope

The scope is a (depth|level) of a hierarchical namespace. As namespace, the scope groups name but at a hierarchical level. the global scope of a linux file system is / the local scope for a file...



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