Library of Congress Classification: Difference between revisions

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Together with the Dewey Decimal System (DDC), LCC make up the two main classification system used in US libraries.<ref name="DeweyDiscord" /> LCC is favored by large academic and research libraries.
 
Systems of classification can be evaluated on several metrics, including expressiveness (the ability of the numeration system to express the hierarchal and correlative relationships between topics), hospitality (the ability of the system to accommodate new subjects), and brevity (length of call numbers).<ref name=":3" /> While LCC is significantly less expressive than DDC, it is extremely hospitable, mainly in the fact that five class (I, O, UW, X, and Y) lack any assignment to topics.<ref name=":4" /> LCC call numbers also tend to be shorter than those in DDC.
 
The main difference between DDC and LCC is their approach to classifying. Dewey's system is a comprehensive classification to all topics, with no regard to the actual collections a library might hold. While this has allows it to be successfully adapted into more modern classification systems for use outside of libraries, such as the [[Universal Decimal Classification]] (UDC),<ref>"A Brief Introduction to the Dewey Decimal Classification". OCLC. Archived from the original on May 3, 2013. Retrieved November 16, 2013.</ref> it does make it more unwieldy for large or specialized collections. On the other hand, Hanson and Martel designed LCC specifically for library use, which means while it does not completely enumerate the world, it does more reflect what books a library might hold.<ref name=":6" />