Metadata

Metadata

Metadata is a term used to describe data that provides information about other data. In other words, it is "data about data". Many different types of entities use metadata, including libraries, museums, and computer systems. For example, a digital image may include metadata that describes how large the picture is, the color depth, the image resolution, when the image was created, and other data. A text document's metadata may contain information about how long the document is, who the author is, when the document was written, and a short summary of the document. Metadata is essential in the management, organization, and use of data.

Types of Metadata

Metadata can be classified into three main types: descriptive, structural, and administrative.

• Descriptive Metadata describes a resource for purposes such as discovery and identification. It can include elements such as title, abstract, author, and keywords.

• Structural Metadata indicates how compound objects are put together, for example, how pages are ordered to form chapters.

• Administrative Metadata provides information to help manage a resource, such as when and how it was created, file type and other technical information, and who can access it.

Uses of Metadata

Metadata is used in various fields and for various purposes. Some of the main uses of metadata include:

• Data Management: Metadata helps in the management of resources by providing necessary information about the data's origin, structure, and standard.

• Resource Discovery: Metadata aids in resource discovery by allowing resources to be found by relevant criteria, identifying resources, bringing similar resources together, distinguishing dissimilar resources, and giving location information.

• Digital Asset Management: Metadata plays a crucial role in managing digital assets by providing information about the asset's creation, usage, preservation, and rights.

• Web Search Engines: Metadata helps search engines to understand the content and context of web pages, thereby improving the accuracy and relevance of search results.

Metadata Standards

There are various Metadata Standards that have been developed to ensure consistency in the creation, sharing, and use of metadata. These standards provide guidelines on what information should be included in metadata and how it should be structured. Some of the widely used metadata standards include Dublin Core, Metadata Object Description Schema (MODS), and Encoded Archival Description (EAD).

See Also

• Data Dictionary
• Data Modeling
• Data Governance
• Data Architecture
• Data Integration

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