Definitions for data hierarchy

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Princeton's WordNet

  1. data hierarchy(noun)

    an arrangement of data consisting of sets and subsets such that every subset of a set is of lower rank than the set

Freebase

  1. Data hierarchy

    Data Hierarchy refers to the systematic organization of data, often in a hierarchical form. Data organization involves fields, records, files and so on. A data field holds a single fact or attribute of an entity. Consider a date field, e.g. "September 19, 2004". This can be treated as a single date field, or 3 fields, namely, month, day of month and year. A record is a collection of related fields. An Employee record may contain a name field, address fields, birthdate field and so on. A file is a collection of related records. If there are 100 employees, then each employee would have a record and the collection of 100 such records would constitute a file. Files are integrated into a database. This is done using a Database Management System. If there are other facets of employee data that we wish to capture, then other files such as Employee Training History file and Employee Work History file could be created as well. The above is a view of data seen by a computer user. The above structure can be seen in the hierarchical model, which is one way to organize data in a database.

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