Richardpruen: no index

2023-04-17T09:38:37Z

no index

← Older revision		Revision as of 10:38, 17 April 2023
Line 26:		Line 26:

	{{Library-stub}}		{{Library-stub}}
			__NOINDEX__
			__NONEWSECTIONLINK__

Richardpruen: 1 revision imported

2022-01-02T13:33:29Z

1 revision imported

← Older revision		Revision as of 14:33, 2 January 2022
(No difference)

Wikipedia>BarrelProof: Removing use of old article name as redirect in order to make it easier to find other links to the old name

2021-12-07T23:35:46Z

Removing use of old article name as redirect in order to make it easier to find other links to the old name

New page

{{Short description|Combined library catalog describing the collections of a number of libraries}}
{{Use dmy dates|date=July 2021|cs1-dates=y}}
A '''union catalog''' is a combined [[library catalog]] describing the collections of a number of [[library|libraries]]. Union catalogs have been created in a range of media, including [[book]] format, [[microform]], [[card catalog|card]]s and more recently, networked electronic [[databases]]. Print union catalogs are typically arranged by title, author or subject (often employing a [[controlled vocabulary]]); electronic versions typically support keyword and [[Boolean logic|Boolean]] queries.

Union catalogs are useful to [[librarian]]s, as they assist in locating and requesting materials from other libraries through [[interlibrary loan]] service. They also allow researchers to search through collections to which they would not otherwise have access, such as [[manuscript]] collections.

The largest union catalog ever printed is the American ''[[National Union Catalog|National Union Catalog Pre-1956 Imprints]]'' (NUC), completed in 1981.<ref name="Beall-Kafadar_2005"/> This achievement has since been superseded by the creation of union catalogs in the form of electronic databases, of which the largest is [[OCLC]]'s [[WorldCat]]. Another example is [[COPAC]] provided by [[Research Libraries UK]], which was superseded by Library Hub Discover in 2019. A third example is AMICUS, provided by [[Library and Archives Canada]].<ref name="AMICUS"/>

For academic publications, several [[academic search engines]] exist to combine the [[open data]] provided by [[open archive]]s through [[OAI-PMH]], as well as records from publishers deposited in [[CrossRef]] and other sources. They include [[BASE (search engine)|BASE]], [[CORE (research service)|CORE]] and Unpaywall, which indexes over 20 million [[open access]] publications as of 2020.<ref name="Dhakal_2019"/>

== See also ==
* [[OAIster]]
* [[SUNCAT]]
* [[Trove]]

== References ==
{{Reflist|refs=
<ref name="Beall-Kafadar_2005">{{Cite journal |title=The Proportion of NUC Pre-56 Titles Represented in OCLC WorldCat |author-last1=Beall |author-first1=Jeffrey |author-link1=Jeffrey Beall |last2=Kafadar |first2=Karen |author-link2=Karen Kafadar |date=2005 |journal=College & Research Libraries |volume=66 |issue=5 |pages=431–435 |doi=10.5860/crl.66.5.431 |doi-access=free}}</ref>
<ref name="AMICUS">{{Cite web |title=About AMICUS |url=http://www.collectionscanada.ca/amicus/006002-122-e.html |access-date=2016-11-01 |url-status=live |archive-url=https://web.archive.org/web/20161104004540/http://www.collectionscanada.ca/amicus/006002-122-e.html |archive-date=2016-11-04}}</ref>
<ref name="Dhakal_2019">{{Cite journal |title=Unpaywall |author-last=Dhakal |author-first=Kerry |date=2019-04-15 |journal=Journal of the Medical Library Association |volume=107 |issue=2 |pages=286–288 |doi=10.5195/jmla.2019.650 |pmc=6466485}}</ref>
}}

{{Authority control}}

[[Category:Library catalogues]]

{{Library-stub}}

Union catalog - Revision history

Richardpruen: no index

Richardpruen: 1 revision imported

Wikipedia>BarrelProof: Removing use of old article name as redirect in order to make it easier to find other links to the old name