NAME: Definition of Second Indicator (Display constant controller) in 76X-78X Linking Entry Fields in the USMARC Bibliographic Format
SOURCE: Library of Congress
SUMMARY: This paper proposes the addition of a second indicator in the 76X-78X fields to control the generation of a display constant. Because subfield $i was defined in the linking entry fields recently, there needs to be a mechanism to suppress the tag related display constant to enable the substitution of text in subfield $i.
KEYWORDS: Field 76X-78X (Bibliographic); Linking Entries; Display constant controller
RELATED: 96-4 (Jan. 1996)
STATUS/COMMENTS:
12/15/96 - Forwarded to USMARC Advisory Group for discussion at the 1997 Midwinter MARBI meetings.
2/17/97 - Results of USMARC Advisory Group discussions - Approved.
2/25/97 - Results of final LC review - Approved.
PROPOSAL NO. 97-2: Definition of Second Indicator (Display constant controller)
1. BACKGROUND
Proposal No. 96-4 (Defining a Constituent Unit Entry Field in the
USMARC Bibliographic Format) was approved in January 1996. It
proposed a field for recording descriptive information about items
that are constituents or elements of the item being cataloged or
contained in the collection, group, or set being cataloged. Two
options were presented: broadening existing field 770
(Supplement/Special Issue Entry) or adding a new field 774. In
considering the relationships between field 770, 772, 773 and a
possible new field 774, the paper detailed the need for a second
indicator value to control the display constant in field 772
(Parent Record Entry), since currently only "Supplement to:" is
generated based on the field tag. The map community has used this
field as a link to the parent for single issues of series. To
accommodate this need in field 772 and the need for a display
constant controller in the new field 774 (which was the selected
option for constituent unit entries), a second indicator was
defined in both fields. In addition, subfield $i (Display text),
which was needed in the new field 774, was approved for use in all
76X-78X linking entry fields for text to replace the system
generated constant associated with the other values in the second
indicator.
2. DISCUSSION
In the 76X-78X Linking Entry fields the second indicator is defined
for fields 780 (Preceding Entry) with seven values and 785
(Succeeding Entry) with eight values. Although the definition of
this indicator is Type of relationship, essentially it is used to
control a display constant associated with the field. The second
indicator is now defined in fields 772 and 774 as Display constant
controller as follows:
772 Display constant controller
# Supplement to
0 Parent
8 No display constant generated
774 Display constant controller
# Constituent unit
0 Includes
8 No display constant generated
Proposal 96-4 suggested defining value # as "No information
provided" in field 772; this would allow for existing records to be
accommodated and the field related display constant documented in
the format would be used for value #. However, the MARBI committee
preferred to define # as the actual display constant to be used.
In the case of field 772, "Supplement to" was associated with the
field tag and value 0 was added for items that are single issues
and use the field to link to the parent. In the case of field 774
the second indicator values presented in the paper were based on
what would be used if the first option, broadening the use of field
770, were selected. Thus, value # would be used to generate the
tag related display constant (Supplement to) and value 0 was added
for the constituent unit situation (using "Includes" because it was
more generic than "Constituent unit"). However, when the proposal
was approved to use field 774, the committee did not take a close
look at how those second indicator values would apply to a new
field, where there were no existing records to consider. The
values # (Constituent unit) and 0 (Includes) are meant to
accommodate the same situation and they need to be combined.
Since subfield $i was defined across linking entry fields, a
display constant controller is needed to suppress the tag
associated display constant and allow the text in subfield $i to
substitute for it. A second indicator is needed in the following
fields:
760 Main Series Entry
762 Subseries Entry
765 Original Language Entry
767 Translation Entry
770 Supplement/Special Issue Entry
773 Host Item Entry
775 Other Edition Entry
776 Additional Physical Form Entry
777 Issued With Entry
786 Data Source Entry
787 Nonspecific Relationship Entry
In each field value # could be defined as the tag related display
constant documented in the format and value 8 as No display
constant provided. All fields except 786 and 787 have display
constants associated. Fields 786 and 787 could define the
indicator with value # meaning "No information provided", or they
could be excluded from the list of fields with the second indicator
defined.
CONSER is interested in using the indicator value to allow for
including display text in subfield $i. Some possible examples are
as follows:
787 08 $iCompanion publication to:$tEmpire State report
(1982)$x0747-8622$w(DLC) 84647292
787 08 $iGuide to the microfiche collection:$t
Phonefiche $w (DLC) 88641083
3. PROPOSED CHANGES
The following is presented for consideration:
- In the USMARC Bibliographic Format define the second
indicator value in fields 760, 762, 765, 767, 770, 773,
775, 776, and 777 as follows;
Second Indicator Display constant controller
# [Tag related phrase]
8 No display constant generated
In each field, the display constant associated with the
field tag will be generated when value # is used.
- In the USMARC Bibliographic Format define the second
indicator in fields 786 and 787 as follows:
Second Indicator Display constant controller
# No information provided
8 No display constant generated
- In field 774, delete value 0 (Includes) in the second
indicator.
See Attachment A for a description of this field if this
proposal is approved.
------------------------------------------------------------------
ATTACHMENT A
< > indicates addition; [ ] indicates deletion
76X-78X Linking Entries--General Information
760 Main Series Entry (R)
762 Subseries Entry (R)
765 Original Language Entry (R)
767 Translation Entry (R)
770 Supplement/Special Issue Entry (R)
772 Parent Record Entry (R)
773 Host Item Entry (R)
774 Constituent Unit Entry (R)
775 Other Edition Entry (R)
776 Additional Physical Form Entry (R)
777 Issued With Entry (R)
780 Preceding Entry (R)
785 Succeeding Entry (R)
786 Data Source Entry (R)
787 Nonspecific Relationship Entry (R)
Indicators
First Note controller
0 Display note
1 Do not display note
Second
760-770,
773[,]<->[775]-777
<Display constant controller> [Undefined]
# <Tag related phrase> [Undefined]
8 No display constant generated>
<786-787 Display constant controller
# No information provided
8 No display constant generated>
772 Display constant controller
# Supplement to
0 Parent
8 No display constant generated
[774 Display constant controller
Constituent unit
[0 Includes]
8 No display constant generated]
780 Type of relationship
0 Continues
1 Continues in part
2 Supersedes
3 Supersedes in part
4 Formed by the union of ... and ...
5 Absorbed
6 Absorbed in part
7 Separated from
785 Type of relationship
0 Continued by
1 Continued in part by
2 Superseded by
3 Superseded in part by
4 Absorbed by
5 Absorbed in part by
6 Split into ... and ...
7 Merged with ... to form ...
8 Changed back to
Library of Congress