metadata

Metadata refers to data about data. It provides descriptive information that helps identify, organize, and contextualize a resource.

Characteristics

• Descriptive: explains what the data is (title, author, keywords).
• Structural: shows how the data is organized (chapters, sections, file format).
• Administrative: tracks technical details (creation date, version, permissions).

Analogy

Metadata can be compared to the catalog card of a library book: it contains the ISBN, publisher, author, edition, a short summary, and the shelf location. This information doesn’t replace the book itself, but makes it easier to find and understand.

Uses

• Search and retrieval: enables locating information quickly in databases or archives.
• Contextualization: clarifies when, where, and how data was created or modified.
• Data management: supports version control, auditing, and compliance.
• Interoperability: allows systems to exchange and interpret information consistently.

Importance

Without metadata, information becomes harder to classify, track, and reuse. With metadata, data gains meaning, accessibility, and reliability across different contexts.