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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 leader, the directory, and the control and variable fields in OCLC-MARC bibliographic records.</div></div> <div class="mt-category-container mt-subpage-listings-container noindex"><ul class="mt-sortable-listings-container " id="mt-sortable" data-user-can-edit="false" data-page-id="8483"><li class="mt-sortable-listing mt-sortable-listing-detailed " data-page-id="8588"><dl class="mt-listing-detailed mt-edit-section"><dt class="mt-listing-detailed-title"><a class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/10Bibliographic_record_directory" rel="internal"><span class="mt-icon-article-topic-guide"></span>Bibliographic record directory</a></dt><dd class="mt-listing-detailed-image mt-hide-image"><a class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/10Bibliographic_record_directory" rel="internal"><span class="mt-sortable-listing-image mt-image-placeholder"><span>No image available</span></span></a></dd><dd class="mt-listing-detailed-overview">Find the elements of the bibliographic record directory.</dd><dd class="mt-listing-detailed-subpages"><ul class="mt-listings-simple mt-listing-article-list mt-topic-hierarchy-listings mt-guide-listings"><li class="mt-show-more-listing"><a title="Bibliographic record directory elements" class="mt-listing-detailed-subpage-title internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/10Bibliographic_record_directory/Bibliographic_record_directory__elements" rel="internal"><span class="mt-icon-article-topic"></span>Bibliographic record directory elements</a></li></ul></dd></dl></li><li class="mt-sortable-listing mt-sortable-listing-detailed " data-page-id="8592"><dl class="mt-listing-detailed mt-edit-section"><dt class="mt-listing-detailed-title"><a class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields" rel="internal"><span class="mt-icon-article-topic-guide"></span>Bibliographic record variable fields</a></dt><dd class="mt-listing-detailed-image mt-hide-image"><a class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/30Bibliographic_record_variable_fields" rel="internal"><span class="mt-sortable-listing-image mt-image-placeholder"><span>No image available</span></span></a></dd><dd class="mt-listing-detailed-overview">Find the elements of the bibliographic record variable fields.</dd><dd class="mt-listing-detailed-subpages"><ul class="mt-listings-simple mt-listing-article-list mt-topic-hierarchy-listings mt-guide-listings"><li class="mt-show-more-listing"><a title="Tags 010-050" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 051-099" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 100-199" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 200-299" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 300-399" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 400-499" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 500-599" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 600-699" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 700-799" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 800-899" class="mt-listing-detailed-subpage-title 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></li><li class="mt-show-more-listing"><a title="Tags 900-999" class="mt-listing-detailed-subpage-title 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></li></ul></dd></dl></li><li class="mt-sortable-listing mt-sortable-listing-detailed " data-page-id="46304"><dl class="mt-listing-detailed mt-edit-section"><dt class="mt-listing-detailed-title"><a class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/Bibliographic_record_control_field" rel="internal"><span class="mt-icon-article-topic-guide"></span>Bibliographic record control field</a></dt><dd class="mt-listing-detailed-image mt-hide-image"><a class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/Bibliographic_record_control_field" rel="internal"><span class="mt-sortable-listing-image mt-image-placeholder"><span>No image available</span></span></a></dd><dd class="mt-listing-detailed-overview">Find the elements of the bibliographic control field.</dd><dd class="mt-listing-detailed-subpages"><ul class="mt-listings-simple mt-listing-article-list mt-topic-hierarchy-listings mt-guide-listings"><li class="mt-show-more-listing"><a title="Bibliographic record control field elements" class="mt-listing-detailed-subpage-title internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/Bibliographic_record_control_field/Bibliographic_record_control_field_elements" rel="internal"><span class="mt-icon-article-topic"></span>Bibliographic record control field elements</a></li></ul></dd></dl></li><li class="mt-sortable-listing mt-sortable-listing-detailed " data-page-id="46301"><dl class="mt-listing-detailed mt-edit-section"><dt class="mt-listing-detailed-title"><a class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/Bibliographic_record_leader" rel="internal"><span class="mt-icon-article-topic-guide"></span>Bibliographic record leader</a></dt><dd class="mt-listing-detailed-image mt-hide-image"><a class="internal" href="https://help.oclc.org/Metadata_Services/OCLC_MARC_records/Content_designators_for_bibliographic_data/Bibliographic_record_leader" rel="internal"><span 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