Answer:
Metadata is the data that describes other data, serving as an informative label.
In computing it can be seen as a structured information about a file (date created, creator, software used to create, last modified, file format, file fingerprint, etc)
Explanation:
Why is Metadata Important?
• For to identify unique records
• Aggregating content based on common attributes or types
• Search indexes metadata
• Collate filtered views
• Browse
• Security and permissions
• Workflow and Document lifecycle
Data warehousing.
Warehousing - The act of storing goods in a warehouse.
Metadata can be seen as summarized data that leads us to detailed data. It is a road-map, defines the warehouse objects, acts as a directory.
A data warehouse, is a medium with created metadata for the data names and definitions of a given data warehouse. Data extractions from this warehouse is often time-stamped by other metadata and also show its source.
The description for each type of Meta data in the data warehouse can be seen categorized into Business, Technical and Operational Metadata.
• Business Metadata − this category embodies the ownership information, business definition, and changing policies.
Technical Metadata − It embodies database system names, key attributes and indices (structural information), data types and allowed values, table and column names and sizes.
Operational Metadata − It embodies both the currency of data and data lineage. Currency of data shows whether the data is archived, active, or purged. Lineage of data shows the history of data migrated and transformation applied on it.