Tag of the Month

Category: Tag of the Month Authority Archives
Title: 450 - See From Tracing - Topical Term (R)

The See From Tracing - Topical Term (450 tag) of the 
MARC authority record contains a term not used as a 
subject access point. This term is linked to the 
proper term that can be used as a subject heading. 
Many of the subject headings established in the 
Library of Congress Subject Headings (LCSH), 
the Sears List of Subject Headings, and the 
Library of Congress subject headings for children's 
literature (LCAC) include these unauthorized terms. 
The letters UF (Use For) appear at the beginning of 
the list of unauthorized terms. Using the 450 tag 
creates a see reference taking the person who searches 
by the unauthorized term to the correct subject 

The Sears List of Subject Headings entry for
Automobiles begins: 

     Automobiles 388.3; 629.222
       UF Cars (Automobiles) 
          Motor cars 
This means a 450 tag will need to be created for Cars
(Automobiles) and a second 450 tag for Motor cars. 
(See examples) 

The local library could also add other 450 tags to 
create see references from other words that library 
users tend to use as search terms. 


First  Undefined

 blank Undefined 

Second  Undefined

 blank Undefined 


   Main term portion

     a Topical term (NR) 

   Subject subdivision portion

     v Form subdivision (R) 

     x General subdivision (R) 

     y Chronological subdivision (R) 

     z Geographical subdivision (R) 



     150    _aEducation, Primary 
     450    _aChildren
            _xEducation (Primary)
     450    _aPrimary education

     150    _aVietnamese Conflict, 1961-1975
     450    _aVietnam Conflict, 1961-1975
     450    _aVietnam War, 1961-1975     
     450    _aVietnamese War, 1961-1975

     150    _aUniversities and colleges
            _xEntrance examinations
     450    _aCollege boards (Examinations)    
     450    _aCollege entrance examinations    
     450    _aEntrance examinations for college

     150    _aArt, Modern
            _y19th century
     450    _aArt
            _y19th century

     150    _aMafia
            _zUnited States
     450    _aCosa Nostra

     150    _aHolmes, Sherlock (Fictitious character)
     450    _aSherlock Holmes (Fictitious character)


     150    _aAutomobiles       
     450    _aCars (Automobiles)
     450    _aMotor cars

     150    _aElementary education
     450    _aChildren
     450    _aEducation, Elementary 
     450    _aEducation, Primary         
     450    _aEducation of children      
     450    _aGrammar schools            
     450    _aPrimary education

     150    _aVietnam War, 1961-1975
     450    _aVietnamese Conflict, 1961-1975 
     450    _aVietnamese War, 1961-1975

     150    _aColleges and universities
            _xEntrance examinations
     450    _aCollege entrance examinations     
     450    _aEntrance examinations for colleges


     150    _aDogs
     450    _aPuppies
     150    _aStrangers              
     450    _aChildren and strangers


     150    _aLocal authors
     450    _aIowa authors
     450    _aSioux City authors