About MARC Tags
The acronym MARC stands for machine readable cataloging. The MARC tags display provides the fullest possible tagged display for a single record from the NLS catalog. It includes the full bibliographic information, including the "fixed field" or fixed-length data elements and locally defined fields, with the field tags and content designation specified by the MARC 21 format, a communication standard that enables exchange of bibliographic, holdings, and other data among electronic systems. The leader is displayed; the directory is not displayed. More information on MARC 21
All record displays include the call number by which materials must be requested. Some information displays as a hypertext link (in blue and underlined). Selecting a link launches a search for related records. Consult the Full Record display for the most complete labeled display of bibliographic information. To focus on subject headings, and any information summarizing and/or classifying the content of the work, consult the Subjects/Content display. View the Brief Record display for the most basic information about the work.
Search, Navigation and Output:
Several lines of information relating to the search are
displayed below the button bar, and above and below Subjects/Content
display on the screen:
- Database Name:
- Most catalog records display the name "NLS Voyager Catalog."
- You Searched:
- A description of the search is displayed after this label (e.g., Subject = cats, Command Keyword = (wood? OR forest) AND "resource manage?"). The text before the = is the name of the search method used, and the text after the = is the actual search performed.
- Search Results:
- A legend identifies the currently displayed catalog record number within the total search set (e.g., Displaying 2 of 35, Displaying 1 of 10,000).
- A search in the Online Catalog never results in more than 10,000 catalog records, even when more than 10,000 records match the search. If the results set is truncated at 10,000, a warning message displays in the titles list.
- Subject, Name and Call Number searches are set to
"browse" the entire Online Catalog before and after
the search term entered. Since this method does not
create a distinct record set, the legend on a single
record display is
Displaying 1 of 1
.
- Navigation Icons:
- If a search retrieves multiple catalog records, it is possible
to page forward and back, one record at a time, using the
and
buttons.
- Full Title:
- Below the four display selection tabs, the title of the work displays as it appears on the title page (or its equivalent).
- Print, Save and Email:
- Below the display of the catalog record information, a table displays with options for output. For more information consult the help screen for Print, Save and Email.
Bibliographic Information:
The following information will display if present in the catalog record:
- Relevance:
- A record retrieved by the Keyword search method displays a relevance indicator before the bibliographic information.
- LC Control Number:
- A unique record identification number assigned by NLS.the Library of Congress.
- Type of Material:
- The kind of material represented by the catalog record and,
in some cases, the level at which it is being described, e.g.,
Braille
orAudio Book
, etc. - MARC21 record
- The complete record with MARC 21 tags displays.