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The quality and accuracy of machine translation can vary significantly from one text to another. Read the page in original English <a onclick="goToLanguage('en')">here</a>.</div> <script type="text/javascript">/*<![CDATA[*/ // Determine if machine translation message should be shown function displayMachineTranslationMessage() { // Show if Italian, excluding certain pages if (thisSiteLanguage == 'it' && !document.querySelector('.columbia-page-home')) { document.querySelector('#machine-translation-message').style.display = null; } } displayMachineTranslationMessage();/*]]>*/</script> </div> <div class="mt-content-side"></div> <div id="mt-toc-container" data-title="Table of contents" data-collapsed="true"> <button class="mt-toggle mt-summary-toggle ui-button-icon mt-toggle-expand">Table of contents</button> <div class="mt-toc-content mt-collapsible-section mt-toc-hide"> <em>No headers</em> </div> </div> <div id="page-top"> <div id="topic"> <div id="pageText"> <div class="mt-page-summary"><div class="mt-page-overview">Find the elements of the bibliographic record variable fields.</div></div> <p>Each bibliographic record contains alphanumeric data. Tags are in sequence according to the first digit. However, they are not necessarily in numeric sequence within a block of tags beginning with the same number. Even though the nature of cataloging data is such that many tags are not repeated, most variable tags may be repeated. Each variable field ends with a field terminator. The last field ends with both a field terminator and a record terminator.</p> <p>In <i>OCLC-MARC Records</i>, any element, value, field, subfield, etc., marked <i>obsolete</i> is no longer valid. Current records will <b>not</b> contain these invalid codes. However, records supplied from archives (e.g., OCLC Local Database Creation service records) may contain obsolete MARC coding.</p> <p><span class="mt-icon-info2"> Note: </span>Unless described otherwise, all fields are valid in all formats. See <a title="https://www.oclc.org/bibformats/en.html" href="https://www.oclc.org/bibformats/en.html" target="_blank" rel="external noopener nofollow" class="link-https">Bibliographic Formats and Standards</a> for additional information.</p> <div id="d45d7cf2-4c64-2ff0-c620-e59889d736d7" class="mt-guide-content"><div class="noindex"><ul class="mt-topic-hierarchy-listings mt-guide-listings"><li data-page-id="8958" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 010-050" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_010-050" rel="internal"><span class="mt-icon-article-topic"></span>Tags 010-050</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 010-050.</dd></dl></li><li data-page-id="8959" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 051-099" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_051-099" rel="internal"><span class="mt-icon-article-topic"></span>Tags 051-099</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 051-099.</dd></dl></li><li data-page-id="8960" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 100-199" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_100-199" rel="internal"><span class="mt-icon-article-topic"></span>Tags 100-199</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 100-199.</dd></dl></li><li data-page-id="8961" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 200-299" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_200-299" rel="internal"><span class="mt-icon-article-topic"></span>Tags 200-299</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 200-299.</dd></dl></li><li data-page-id="8962" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 300-399" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_300-399" rel="internal"><span class="mt-icon-article-topic"></span>Tags 300-399</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 300-399.</dd></dl></li><li data-page-id="8963" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 400-499" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_400-499" rel="internal"><span class="mt-icon-article-topic"></span>Tags 400-499</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 400-499.</dd></dl></li><li data-page-id="8965" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 500-599" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_500-599" rel="internal"><span class="mt-icon-article-topic"></span>Tags 500-599</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 500-599.</dd></dl></li><li data-page-id="8964" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 600-699" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_600-699" rel="internal"><span class="mt-icon-article-topic"></span>Tags 600-699</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 600-699.</dd></dl></li><li data-page-id="8966" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 700-799" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_700-799" rel="internal"><span class="mt-icon-article-topic"></span>Tags 700-799</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 700-799.</dd></dl></li><li data-page-id="8967" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 800-899" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_800-899" rel="internal"><span class="mt-icon-article-topic"></span>Tags 800-899</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic record tags 800-899.</dd></dl></li><li data-page-id="8968" class="mt-list-topics"><dl class="mt-listing-detailed"><dt class="mt-listing-detailed-title"><a title="Tags 900-999" class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields/Tags_900-999" rel="internal"><span class="mt-icon-article-topic"></span>Tags 900-999</a></dt><dd class="mt-listing-detailed-overview">Find the indicators, subfield codes, repeatability, and definitions for bibliographic tags 900-999.</dd></dl></li></ul></div></div><script type="application/json" id="mt-localizations-guide-tabs-settings">/*<![CDATA[*/{"MindTouch.IDF3.label.guide.settings.classifications":"Classification settings","MindTouch.IDF3.label.guide.settings.learningpath":"Path settings","MindTouch.IDF3.label.overview.max.count":"{0} characters 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