Data dictionary

A data dictionary is a centralised repository that holds detailed information about data, rather than the data itself. It is used primarily for information resource management, providing structured documentation that defines how data is organised, stored and used within a database or data system.

The information contained within a data dictionary typically includes:

The meaning and definition of each data field.
The origin or source of the data.
The format and data type (e.g., numeric, text, date).
Permitted values or coding structures.
Relationships between different data fields or tables.
File names and record structures.
The number of records within each file.

Unlike a data catalogue or database, a data dictionary does not contain the raw data itself. Instead, it functions as a reference guide to the structure and organisation of the database.

A data dictionary may also document governance-related details, such as:

The data owner or responsible party.
Access permissions and user roles.
How frequently the data is updated or accessed.
Compliance or retention requirements.

In essence, a data dictionary provides essential 'book-keeping' and structural information that ensures consistency, clarity and effective management of data assets. Within market research, it is particularly valuable when managing large datasets, tracking variable definitions, maintaining coding frameworks and ensuring transparency in data processing and reporting.

Why partner with DJS Research?

We build small, director-led, teams of sector experts who are with you from brief to debrief. As an employee-owned company, every one of us is invested in delivering quality, value, and long-term impact.

From agile testing to deep-dive strategic studies, we design research to meet your specific objectives. The agility of our in-house operations team and strength of our UK-wide recruiter network enable seamless execution at scale.

Our sector-focused teams have decades of experience understanding audiences and the complexities of the markets in which our clients operate. Working collaboratively we deliver actionable insight which drives positive change.

Data dictionary

Data dictionary

A data dictionary is a centralised repository that holds detailed information about data, rather than the data itself. It is used primarily for information resource management, providing structured documentation that defines how data is organised, stored and used within a database or data system.

Why partner with DJS Research?

We are small enough. We are big enough. We are DJS Research

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