Structured data refers to highly organized and clearly defined information that is stored in a predefined format, making it ...

Unstructured data refers to information that does not have a predefined data model or organized format, making it more ...

A data element is defined by size (in characters) and type (alphanumeric, numeric only, true/false, date, etc.). A specific set of values or range of values may also be part of the definition.

A database about data and databases. A data dictionary holds the name, type, range of values, source and authorization for access for each data element in the organization's files and databases.