Hierarchy

hierarchy - [network analysis] A type of network attribute for a network element in a network dataset. Hierarchy can be used during network analysis to assign priority to a network element. For example, in a transportation network dataset, a "road class" hierarchy can be assigned to edges to favor major roads instead of local streets.

[Category=Geospatial ]

Source: esri, 10 May 2012 09:46:56, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation

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Hierarchy - Data within a dimension can often be represented through one or more hierarchies. These are parent-child relationships within a dimension. For instance, in a time dimension, a year is a parent to quarter, a quarter is a parent to month, and so on. As you see here the parent-child relationships can nest. These hierarchies then make it possible to drill up or down within a dimension.

[Category=Business Intelligence ]

Source: Deanna Dicken, 08 November 2012 11:14:54, http://www.databasejournal.com/features/mssql/article.php/3919011/Business-Intelligence-Terminology-101.htm