Editing Faceted classification (section)

==Comparison between faceted and single hierarchical classification==
Hierarchical classification refers to the classification of objects using one ''single'' hierarchical taxonomy. Faceted classification may actually employ hierarchy in one or more of its facets, but allows for the use of more than one taxonomy to classify objects.

*Faceted classification systems allow the assignment of multiple classifications to an object, and enable those classifications to be applied by searchers in multiple ways, rather than in a single, predetermined order. Multiple facets may be used as a first step in a search process.<ref name="Categories, Facets—and Browsable Facets?">Sirovich, Jaimie (2011). Categories, Facets—and Browsable Facets?, from http://www.uxmatters.com/mt/archives/2011/08/categories-facetsand-browsable-facets.php</ref> For example, one may ''start'' from language or subject.
*Hierarchical classification systems are developed classes that are subdivided from the most general subjects to the most specific.<ref>Reitz, Joan M. (2004). Dictionary for library and information science. Westport, CT: Libraries Unlimited</ref>
*Faceted classification systems allow for the combination of facets to [[Filter (software)|filter]] the set of objects rapidly. In addition, the facets can be used to address multiple classification criteria.<ref>Godert, Winfried. F. (1991). Facet classification in online retrieval. International Classification, 18, 98-109</ref>
*A faceted system focuses on the important, essential or persistent characteristics of content objects, helping it to be useful for categorization of fine-grained rapidly changing repositories.
*In faceted classification systems one does not have to know the name of the category into which an object is placed a priori. A controlled vocabulary is presented with the number of documents matching each vocabulary term.
*New facets may be created at any time without disruption of a single hierarchy or reorganizing other facets.
*Faceted classification systems make few assumptions about the scope and organization of the domain. It is difficult to ''break'' a faceted classification schema.<ref>Adkisson, Hiedi P. (2005).  Use of faceted classification.  Retrieved December 1, 2013, from http://www.webdesignpractices.com/navigation/facets.html</ref>