<<

UCS/Unicode
UDC number
undefined character positions
   008/18-27 Undefined (Authority)
   008/30 Undefined (Authority)
   008/34-37 Undefined (Authority)
   Leader/07-08 Undefined (Authority)
   Leader/18-19 Undefined (Authority)
undefined entry map character
undifferentiated personal name
unestablished heading
Unicode
uniform title headings
uniform titles
   130 Heading - Uniform Title (Authority)
   430 See From Tracing - Uniform Title (Authority)
   530 See Also From Tracing - Uniform Title (Authority)
   730 Established Heading Linking Entry - Uniform Title (Authority)
   Appendix E: Initial Definite and Indefinite Articles
   X30 Uniform Titles - General Information (Authority)
Universal Decimal Classification number
unknown origin (standard)
unmodified record
untraced reference
update in process
updates to MARC 21 from LC
   Appendix F: Format Changes, Update No. 6, October 2005
   Appendix F: Format Change Lists
   Appendix F: Format Changes - 1999
   Appendix F: Format Changes, Update No. 1, October 2000
   Appendix F: Format Changes, Update No. 2, October 2001
   Appendix F: Format Changes, Update No. 3, October 2002
   Appendix F: Format Changes, Update No. 4, October 2003
   Appendix F: Format Changes, Update No. 5, October 2004
   Appendix F: Format Changes, Update No. 7, October 2006
   Appendix F: Format Changes, Update No. 10, October 2009
   Appendix F: Format Changes, Update No. 11, February 2010
   Appendix F: Format Changes, Update No. 12, October 2010
   Appendix F: Format Changes, Update No. 9, October 2008
   Appendix F: Format Changes, Update No. 8, October 2007
   Appendix F: Format Changes, Update No. 13, September 2011
   Appendix F: Format Changes, Update No. 14, April 2012
   Appendix F: Format Changes, Update No. 15, September 2012
   Appendix F: Format Changes, Update No. 16, April 2013
   Appendix F: Format Changes, Update No. 17, September 2013
   Appendix F: Format Changes, Update No. 18, April 2014
   Appendix F: Format Changes, Update No. 19, October 2014
   Appendix F: Format Changes, Update No. 20, April 2015
   Appendix F: Format Changes, Update No. 21, September 2015
   Appendix F: Format Changes, Update No. 22, April 2016
   Appendix F: Format Changes, Update No. 23, November 2016
   Appendix F: Format Changes, Update No. 24, May 2017
   Appendix F: Format Changes, Update No. 25, December 2017
   Appendix F: Format Changes, Update No. 26, April 2018
   Appendix F: Format Changes, Update No. 27, November 2018
   Appendix F: Format Changes, Update No. 28, May 2019
   Appendix F: Format Changes, Update No. 28 Addendum Changes, July 2019
   Appendix F: Format Changes, Update No. 29, November 2019
   Appendix F: Format Changes, Update No. 30, May 2020
   Appendix F: Format Changes, Update No. 31, December 2020
   Appendix F: Format Changes, Update No. 32, June 2021
   Appendix F: Format Changes, Update No. 33, November 2021
URI
   883 Machine-generated Metadata Provenance
   884 Description Conversion Information
   677 Definition
URI, Real World Object
URL



validity end date
variable control fields
   Leader/12-16 Base address of data (Authority)
   Variable Control Fields
variable data fields
variable fields
   Scope of the Authority Format
   Variable Control Fields
   Variable Data Fields
varied numbering
   008/13 Numbered or unnumbered series (Authority)
   642 Series Numbering Example (Authority)
version identifier
volume designation
volume number/sequential designation



work and expression
   384 Key
   383 Numeric Designation of Musical Work
   382 Medium of Performance
   381 Other Distinguishing Characteristics of Work or Expression
   380 Form of Work
   336 Content Type
   046 Special Coded Dates
work or expression, other distinguishing characteristics
work, form of



X00
   100 Heading - Personal Name (Authority)
   400 See From Tracing - Personal Name (Authority)
   500 See Also From Tracing - Personal Name (Authority)
   700 Established Heading Linking Entry - Personal Name (Authority)
   X00 Personal Names - General Information (Authority)
X00-X85
X10
   110 Heading - Corporate Name (Authority)
   410 See From Tracing - Corporate Name (Authority)
   510 See Also From Tracing - Corporate Name (Authority)
   710 Established Heading Linking Entry - Corporate Name (Authority)
   X10 Corporate Names - General Information (Authority)
X11
   111 Heading - Meeting Name (Authority)
   411 See From Tracing - Meeting Name (Authority)
   511 See Also From Tracing - Meeting Name (Authority)
   711 Established Heading Linking Entry - Meeting Name (Authority)
   X11 Meeting Names - General Information (Authority)
X30
   130 Heading - Uniform Title (Authority)
   430 See From Tracing - Uniform Title (Authority)
   530 See Also From Tracing - Uniform Title (Authority)
   730 Established Heading Linking Entry - Uniform Title (Authority)
   Appendix E: Initial Definite and Indefinite Articles
   X30 Uniform Titles - General Information (Authority)
X47
   X47 Named Events - General Information
   147 Heading - Named Event
   447 See From Tracing - Named Event
   547 See Also From Tracing - Named Event
   747 Established Heading Linking Entry - Named Event
X48
   148 Heading - Chronological Term (Authority)
   448 See From Tracing - Chronological Term (Authority)
   548 See Also From Tracing - Chronological Term (Authority)
   748 Established Heading Linking Entry - Chronological Term (Authority)
   X48 Chronological Terms - General Information (Authority)
X50
   150 Heading - Topical Term (Authority)
   450 See From Tracing - Topical Term (Authority)
   550 See Also From Tracing - Topical Term (Authority)
   750 Established Heading Linking Entry - Topical Term (Authority)
   X50 Topical Terms - General Information (Authority)
X51
   151 Heading - Geographic Name (Authority)
   451 See From Tracing - Geographic Name (Authority)
   551 See Also From Tracing - Geographic Name (Authority)
   751 Established Heading Linking Entry - Geographic Name (Authority)
   X51 Geographic Names - General Information (Authority)
X55
   155 Heading - Genre/Form Term (Authority)
   455 See From Tracing - Genre/Form Term (Authority)
   555 See Also From Tracing - Genre/Form Term (Authority)
   755 Established Heading Linking Entry - Genre/Form Term (Authority)
   X55 Genre/Form Terms - General Information (Authority)
X62
   X62 Medium of Performance Terms - General Information
   162 Heading - Medium of Performance Term
   462 See From Tracing - Medium of Performance Term
   562 See Also From Tracing - Medium of Performance Term
   762 Established Heading Linking Entry - Medium of Performance Term
X80
   180 Heading - General Subdivision (Authority)
   480 See From Tracing - General Subdivision (Authority)
   580 See Also From Tracing - General Subdivision (Authority)
   780 Subdivision Linking Entry - General Subdivision (Authority)
   X80 General Subdivisions - General Information (Authority)
X81
   181 Heading - Geographic Subdivision (Authority)
   481 See From Tracing - Geographic Subdivision (Authority)
   581 See Also From Tracing - Geographic Subdivision (Authority)
   781 Subdivision Linking Entry - Geographic Subdivision (Authority)
   X81 Geographic Subdivisions - General Information (Authority)
X82
   182 Heading - Chronological Subdivision (Authority)
   482 See From Tracing - Chronological Subdivision (Authority)
   582 See Also From Tracing - Chronological Subdivision (Authority)
   782 Subdivision Linking Entry - Chronological Subdivision (Authority)
   X82 Chronological Subdivisions - General Information (Authority)
X85
   185 Heading - Form Subdivision (Authority)
   485 See From Tracing - Form Subdivision (Authority)
   585 See Also From Tracing - Form Subdivision (Authority)
   785 Subdivision Linking Entry - Form Subdivision (Authority)
   X85 Form Subdivisions - General Information (Authority)



year