A data element description provides detailed information about a specific data element. This description typically encompasses various attributes to help users understand the meaning, use, and origin of the data. These attributes can include:

  1. Name: The official name of the data element.
  2. Alias: Other names or terms that might be used to refer to the data element.
  3. Definition: A clear and concise statement that explains the meaning of the data element.
  4. Data Type: Specifies the kind of data that the element holds (e.g., integer, string, date).
  5. Format: Describes how the data is presented. For instance, a date might be formatted as MM-DD-YYYY.
  6. Allowed Values: Lists the permissible values for the data element, especially if it’s a categorical variable.
  7. Source: Specifies where the data originates or is sourced from.
  8. Usage Notes: Additional information on how the data element should be used or interpreted.
  9. Relationships: Indicates how this data element relates to other data elements or tables.
  10. Constraints: Restrictions or limitations associated with the data element.

Data element descriptions are vital in ensuring data quality, consistency, and usability. They often form a part of a data dictionary or metadata repository, which acts as a reference for all users and developers working with the data.