26. Examples:
1. Multiple pre-AACR2 forms being combined into a single AACR2 heading
pre-AACR2 headings:
151 ## $a Hawaiian Islands
151 ## $a Hawaii (Ter.)
151 ## $a Hawaii
AACR2 heading:
151 ## $a Hawaii
Retain only one authority record for "Hawaii"; do not trace any linking references. In the 667 field add the information: 667 ## $a Includes the old catalog headings: Hawaiian Islands; Hawaii (Ter.). Initiate changes to MARC bibliographic records.
2. Single pre-AACR2 form being divided into multiple AACR2 headings (e.g., 22.2B)
pre-AACR2 heading:
100 1# $a Linington, Elizabeth
AACR2 headings:
100 1# $a Linington, Elizabeth
100 1# $a Shannon, Dell, $d 1921-
100 1# $a Egan, Lesley, $d 1921-
100 1# $a O'Neill, Egan, $d 1921-
100 1# $a Blaisdell, Anne, $d 1921-
Prepare authority records for all headings, connecting them with explanatory see also references; do not trace linking references. In the 667 field of the authority records for Shannon, Egan, O'Neill, and Blaisdell, make the note: 667 ## $a Old catalog heading: Linington, Elizabeth.
Examine the bibliographic file under Linington and initiate changes to the headings on those records written under the names Shannon, Egan, O’Neill, and Blaisdell.
3. Non exact one-to-one relationship, although only two headings may be involved
pre-AACR2 heading:
110 2# $a National Research Council of Canada
AACR2 headings:
110 2# $a National Research Council of Canada
(for pre-1972 imprints)
110 2# $a National Research Council Canada
(for pre-1972 imprints)
Retain the authority record for "National Research Council of Canada" and create one for "National Research Council Canada," coding both as AACR2. Trace see also references between the headings but do not trace a linking reference. In the 667 field of the authority record for "National Research Council of Canada" add the information: 667 ## $a For pre-1972 imprints only. On the authority record for "National Research Council Canada" add in the 667 field the information: 667 ## $a For 1972- imprints; old catalog heading: National Research Council of Canada.
Examine the bibliographic files under "National Research Council of Canada" and initiate changes to the headings on those records with 1972- imprints.
4. Conflicting personal name headings when the conflict is resolved by changing the existing heading
new heading:
100 1# $a Smith, Paul
(No additional information is available)
existing heading:
100 1# $a Smith, Paul
(The birth date is known and added to the heading to resolve the conflict: 100 1# $a Smith, Paul, $d 1939- )
Change the authority record for the existing heading. Initiate changes to bibliographic records to agree with the new form of heading. Do not trace a linking reference or make a note about the old catalog heading. The change is not caused by a change for AACR2.
5. Linking reference would normalize to the same form as the heading
pre-AACR2 heading:
100 1# $a Pluchart, Jean Jacques
AACR2 heading:
100 1# $a Pluchart, Jean-Jacques
Do not trace a linking reference because it would normalize to the same form as the heading. In the 667 field make the note: 667 ## $a Old catalog heading: Pluchart, Jean Jacques. Initiate changes to MARC bibliographic records.
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