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The International Standard Identifier for Libraries and Related Organisations (ISIL), ISO 15511, assigns unique identifiers to libraries and related organisations, such as archives and museums. The Danish National Library Authority is the international authority for maintaining the standard and its registry.〔(【引用サイトリンク】title=UK National Agency for ISIL )〕 An ISIL is alphanumeric, with a maximum of 16 characters.〔 Valid symbols are A-Z, 0-9, solidus, hyphen-minus and colon. An ISIL consists of a prefix identifying the authority which issued the ISIL, a dash, and then an identifier issued by that authority. All two letter prefixes are reserved for the ISO 3166-1 alpha-2 country code, followed by an identifier assigned by that country's national library authority. Global-level identifiers can also be assigned, which are not associated with a particular country, e.g. 'oclc-' for the OCLC. The suffix is generally a pre-existing system of identifying libraries; thus, ISIL unifies existing systems around the world rather than instituting an entire system from scratch. The code for the library of the Institution of Civil Engineers, for example, is UkLoICE,〔(【引用サイトリンク】title=MARC organisation codes for the UK and its dependencies )〕 the first two characters being the county code for the United Kingdom.== References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「International Standard Identifier for Libraries and Related Organizations」の詳細全文を読む スポンサード リンク
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