Metadata is often defined as “data about data”. More specifically, these are structured information that will allow both a description and the location of a resource. Metadata is required if a large amounts of data has to be managed. Therefore, it is crucial for understanding information that is stored in a data warehouse. Moreover, its importance in XML-based Web applications is increasing steadily.

• Title
• Author
• Publisher
• Year of publication
• Subject

To view the different metadata schemes that are being developed as standards across disciplines (such as e-commerce, library science, and archiving), please click on the link below:

http://en.wikipedia.org/wiki/Metadata_standards