A union catalog is a combined library catalog describing the collections of a number of libraries. Union catalogs have been created in a range of media, including book format, microform, cards 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 queries.
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- A union catalog is a combined library catalog describing the collections of a number of libraries. Union catalogs have been created in a range of media, including book format, microform, cards 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 queries. Union catalogs are useful to librarians, 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 print union catalog ever published is the American National Union Catalog Pre-1956 Imprints (NUC), completed in 1981. This achievement has since been superseded by the creation of large electronic resource sharing networks, such as OCLC's WorldCat.
- 聯合目錄是指一種聯合二所以上圖書館館藏目錄的資料庫。使用者從單一窗口網站來檢索國內多所圖書館的館藏，其能提供給使用者知道哪個圖書館有收藏他所需要的館藏資訊。 目前全球最大的線上聯合目錄為OCLC所提供的「WorldCat」資料庫；目前國內最大的線上聯合目錄為「全國圖書書目資訊網」（National Bibliographic Information Network，簡稱NBINet），它是由參與合作圖書館和國家圖書館所共同合作編目和維護的書目資料庫。
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- A union catalog is a combined library catalog describing the collections of a number of libraries. Union catalogs have been created in a range of media, including book format, microform, cards 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 queries.
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