Logical Data Modeling - Group (Grouping)

Data System Architecture


group (or grouping) refers to the fact of putting things (elements) together in a container. This is a one-to-many relationship.

In data modeling, you group:

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Data System Architecture
(Collection|Container) Data Type (Set, Bag, Sequence)

A collection is a abstract data type for grouping together multiple values. It's therefore sometime known as a container and creates a aggregation relationship A collection is: an object that groups...
HTML - Optgroup element (Group of Option)

optgroup is an HTML element that group options within a select element. optgroup
HTML - datalist

datalist is a html element that creates a set of value permitted (a domain) that may be used in a input element by grouping options. It does not force a selection as the HTML select element does autocomplete...
Data System Architecture
Logical Data Modeling - Entity (Row | Tuple | Member | Unit | Instance )

An entity isone thing which can be distinctly identified. Example: A specific person A specific company A specific group of persons, A specific place, A specific event It's a concept to...
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 - One-to-Many cardinality

One-to-many is also known as : to-many Many-to-one Primary Key-Foreign Key Relationships Parent-Child A many-to-one relationship is where one entity contains values that refer to another entity...
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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