https://ac.bslw.com/community/wiki/index.php?title=Subfield_$w_in_Cross-References&feed=atom&action=historySubfield $w in Cross-References - Revision history2024-03-28T12:19:50ZRevision history for this page on the wikiMediaWiki 1.23.14https://ac.bslw.com/community/wiki/index.php?title=Subfield_$w_in_Cross-References&diff=521&oldid=prevNate: New page: ==Control Subfield - $w== The $w is a control subfield with up to four character positions. One-character alphabetic codes are used to describe special instructions that apply to the dis...2009-02-13T17:04:51Z<p>New page: ==Control Subfield - $w== The $w is a control subfield with up to four character positions. One-character alphabetic codes are used to describe special instructions that apply to the dis...</p>
<p><b>New page</b></p><div>==Control Subfield - $w==<br />
<br />
The $w is a control subfield with up to four character positions. One-character alphabetic codes are used to describe special instructions that apply to the display of 4xx and 5xx fields. The definitions of the codes in subfield $w are dependent on the character position in which they occur, the coding of any character position mandates that each preceding character position contains a code or a fill character (<nowiki>|</nowiki>); succeeding character positions need not be used. For example, if $w/0 and $w/1 are not applicable but $w/2 is applicable, then $w/0 and $w/1 each contain code n (Not applicable) or a fill character (<nowiki>|</nowiki>).&nbsp; The n is used more often than the fill character.&nbsp; <br><br />
The positions available with the subfield $w are as follows:<br />
<br />
Position /0 = Special relationship<br />
<br />
Position /1 = Tracing use restriction<br />
<br />
Position /2 = Earlier form of heading<br />
<br />
Position /3 = Reference display<br />
<br />
Each position has a set of codes that further determine the meaning of that position. As described above if the position is not used an "n" meaning not applicable is used.<br />
<br />
Lets attempt to create a $w code. Details on what each code for every position means can be found at this site; [http://www.loc.gov/marc/authority/adtracing.html http://www.loc.gov/marc/authority/adtracing.html] under MARC21 Authority Format the Tracings and References-General Information section.<br />
<br />
For this example, the heading 400 1 Callaghan, Bede Bertrand,$cSir,$d1912- is an earlier Pre-AACR2 form of Callaghan, Bede,$cSir,$d1912-<br />
<br />
We want this heading as a see reference but there are two things we want to indicate with the $w. We want to let the user know that this is a pre-AACR2 heading (Position/2, code a) and we want to make sure this does not display as a see reference in the reference module. (Position/3,code a) With this in mind, our $w will be coded as follows.<br />
<br />
400 1 $wnnaaCallaghan, Bede Bertrand,$cSir,$d1912-<br />
<br />
[[category:General Information]]</div>Nate