WorldCat

==System architecture==
Local catalogs of many OCLC member libraries are intermittently synchronized with the WorldCat database.<ref>{{cite web |title=About data sync collections – OCLC Support |url=https://help.oclc.org/Metadata_Services/WorldShare_Collection_Manager/Data_sync_collections/About_data_sync_collections_in_Collection_Manager/About_data_sync_collections |language=en |website=www.oclc.org |date=April 14, 2017 |publisher=OCLC |access-date=2021-06-18 |archive-date=June 18, 2021 |archive-url=https://web.archive.org/web/20210618153437/https://help.oclc.org/Metadata_Services/WorldShare_Collection_Manager/Data_sync_collections/About_data_sync_collections_in_Collection_Manager/About_data_sync_collections |url-status=live }}</ref> WorldCat allows participating institutions to add direct links from WorldCat to their own local catalog entries for particular items, which enables the user to click through to the local catalog to quickly determine an item's real-time status (for example, whether or not it is checked out).<ref name="whatis">{{cite web |title=What is WorldCat? |work=worldcat.org |access-date=2015-02-13 |url=https://www.worldcat.org/whatis/ |archive-date=November 14, 2019 |archive-url=https://web.archive.org/web/20191114022052/https://www.worldcat.org/whatis/ |url-status=live }}</ref>

In a small percentage of libraries,<ref>{{cite web |access-date=April 25, 2020 |last=Schonfeld |first=Roger C. |title=What are the larger implications of Ex Libris buying Innovative? |url=https://sr.ithaka.org/blog/what-are-the-larger-implications-of-ex-libris-buying-innovative/ |website=sr.ithaka.org |date=2019-12-05 |quote=OCLC's WorldShare cloud system has yet to achieve critical mass, amounting to 10% of the academic market (but only 4% of [[Association of Research Libraries|ARL]]), and OCLC's entire public library business represents just 10% of the public library market. |archive-date=June 12, 2020 |archive-url=https://web.archive.org/web/20200612014535/https://sr.ithaka.org/blog/what-are-the-larger-implications-of-ex-libris-buying-innovative/ |url-status=live }} For another source of statistics on library system market share, see: {{cite web |title=Library Technology Guides: Marketshare Report |url=https://librarytechnology.org/products/marketshare.pl |website=librarytechnology.org |access-date=June 18, 2021 |archive-date=July 28, 2021 |archive-url=https://web.archive.org/web/20210728144055/https://librarytechnology.org/products/marketshare.pl/ |url-status=live }}</ref> the local catalog is also run by OCLC using an [[integrated library system]] called WorldCat Discovery and WorldShare Management Services.<ref>{{cite journal |last=Breeding |first=Marshall |date=March 2014 |title=OCLC announces WorldCat Discovery service |journal=Smart Libraries Newsletter |volume=34 |issue=3 |pages=6–7 |url=https://librarytechnology.org/document/19032 |publisher=[[American Library Association]] |issn=1541-8820 |access-date=June 18, 2021 |archive-date=June 18, 2021 |archive-url=https://web.archive.org/web/20210618204755/https://librarytechnology.org/document/19032 |url-status=live }}</ref>

Library contributions to WorldCat are made via the Connexion computer program,<ref>{{cite web |title=Connexion – Features |url=https://www.oclc.org/en/connexion/features.html |language=en |publisher=OCLC |access-date=2021-06-18 |archive-date=June 24, 2021 |archive-url=https://web.archive.org/web/20210624201833/https://www.oclc.org/en/connexion/features.html |url-status=live }}</ref> which was introduced in 2001; its predecessor, OCLC Passport, was phased out in May 2005.<ref>{{cite mailing list |last=Dean |first=Becky |title=OCLC Authorities migration timeline |mailing-list=bibco@listserv.loc.gov |date=March 3, 2005 |url=https://listserv.loc.gov/cgi-bin/wa?A2=ind0503&L=BIBCO&P=55 |access-date=2019-06-26}}</ref> [[Cataloging]] librarians may also use the WorldShare Record Manager<ref>{{cite web |title=WorldShare Record Manager: Record-at-a-time cataloging service |url=https://www.oclc.org/en/worldshare-record-manager.html |language=en |website=www.oclc.org |date=April 2, 2021 |publisher=OCLC |access-date=2021-06-18 |archive-date=June 24, 2021 |archive-url=https://web.archive.org/web/20210624200719/https://www.oclc.org/en/worldshare-record-manager.html |url-status=live }}</ref> or WorldCat Metadata API<ref>{{cite web |title=WorldCat Metadata API {{!}} OCLC Developer Network |url=https://www.oclc.org/developer/develop/web-services/worldcat-metadata-api.en.html |language=en |publisher=OCLC |access-date=2021-06-18 |archive-date=June 5, 2021 |archive-url=https://web.archive.org/web/20210605095010/https://www.oclc.org/developer/develop/web-services/worldcat-metadata-api.en.html |url-status=live }}</ref> for similar purposes.<ref>{{cite web |title=OCLC cataloging application comparison |url=https://www.oclc.org/go/en/oclc-cataloging-application-comparison.html |language=en |publisher=OCLC |access-date=2021-06-18 |archive-date=June 18, 2021 |archive-url=https://web.archive.org/web/20210618151215/https://www.oclc.org/go/en/oclc-cataloging-application-comparison.html |url-status=live }}</ref>
Description	What you type	What you get
Italic	''Italic text''	Italic text
Bold	'''Bold text'''	Bold text
Bold & italic	'''''Bold & italic text'''''	*Bold & italic text*
Description	What you type	What you get
Reference	Page text.<ref>[https://www.example.org/ Link text], additional text.</ref>	Page text.^[1]
Named reference	Page text.<ref name="test">[https://www.example.org/ Link text]</ref>	Page text.^[2]
Additional use of the same reference	Page text.<ref name="test" />	Page text.^[2]
Display references	<references />	↑ Link text, additional text. ↑ Link text