Fixed field that comprises the first 24 character positions (00-23) of each
bibliographic record and consists of data elements that contain numbers or coded values
that define the parameters for the processing of the record.
06 - Type of record
One-character alphabetic code used to define the characteristics and components of
a - Language material
Includes microforms and electronic resources that are basically textual in
nature, whether they are reproductions from print or originally produced.
c - Notated music
Used for printed, microform, or electronic notated music.
d - Manuscript notated music
Used for manuscript notated music or a microform of manuscript music.
e - Cartographic material
Includes maps, atlases, globes, digital maps, and other cartographic items.
f - Manuscript cartographic material
Used for manuscript cartographic material or a microform of manuscript
g - Projected medium
Used for motion pictures, videorecordings (including digital video),
filmstrips, slide, transparencies or material specifically designed for
i - Nonmusical sound recording
Used for a recording of nonmusical sounds (e.g., speech).
j - Musical sound recording
Used for a musical sound recording (e.g., phonodiscs, compact discs, or
k - Two-dimensional nonprojectable graphic
Used for two-dimensional nonprojectable graphics such as, activity cards,
charts, collages, computer graphics, digital pictures, drawings, duplication
masters, flash cards, paintings, photo CDs, photomechanical reproductions,
photonegatives, photoprints, pictures, postcards, posters, prints, spirit
masters, study prints, technical drawings, transparency masters, and
reproductions of any of these.
m - Computer file
Used for the following classes of electronic resources: computer software
(including programs, games, fonts), numeric data, computer-oriented multimedia,
online systems or services. For these classes of materials, if there is a
significant aspect that causes it to fall into another Leader/06 category, the
code for that significant aspect is used instead of code m (e.g., vector data
that is cartographic is not coded as numeric but as cartographic). Other
classes of electronic resources are coded for their most significant aspect
(e.g. language material, graphic, cartographic material, sound, music, moving
image). In case of doubt or if the most significant aspect cannot be
determined, consider the item a computer file.
o - Kit
Used for a mixture of various components issued as a unit and intended
primarily for instructional purposes where no one item is the predominant
component of the kit.
p - Mixed
Used when there are significant materials in
two or more forms that are usually related by
virtue of their having been accumulated by or
about a person or body. Includes archival
fonds and manuscript collections of mixed
forms of materials, such as text, photographs,
and sound recordings.
r - Three-dimensional artifact or naturally occurring object
Includes man-made objects such as models, dioramas, games, puzzles,
simulations, sculptures and other three-dimensional art works, exhibits,
machines, clothing, toys, and stitchery. Also includes naturally occurring
objects such as, microscope specimens (or representations of them) and other
specimens mounted for viewing.
t - Manuscript language material
07 - Bibliographic level
One-character alphabetic code indicating the bibliographic level of the
a - Monographic component part
Monographic bibliographic unit that is physically attached to or contained in
another unit such that the retrieval of the component part is dependent on the
identification and location of the host item or container. Contains fields that
describe the component part and data that identify the host, field 773 (Host
c - Collection
Made-up multipart group of items that were not originally published,
distributed, or produced together. The record describes units defined by common
provenance or administrative convenience for which the record is intended as
the most comprehensive in the system.
i - Integrating resource
Bibliographic resource that is added to or changed by means of updates that do
not remain discrete and are integrated into the whole. Examples include
updating loose-leafs and updating Web sites.
m - Monograph/Item
Item either complete in one part (e.g., a single monograph, a single map, a
single manuscript, etc.) or intended to be completed, in a finite number of
separate parts (e.g., a multivolume monograph, a sound recording with multiple
s - Serial
Bibliographic item issued in successive parts bearing numerical or
chronological designations and intended to be continued indefinitely. Includes
periodicals; newspapers; annuals (reports, yearbooks, etc.); the journals,
memoirs, proceedings, transactions, etc., of societies; and numbered
monographic series, etc.
17 - Encoding level
One-character alphanumeric code that indicates the fullness of the bibliographic
information and/or content designation of the MARC record.
# - Full level
Most complete MARC record created from information derived from an inspection
of the physical item.
5 - Partial (preliminary) level
Preliminary cataloging level record that is not considered final by the
creating agency (e.g., the headings may not reflect established forms; the
record may not meet national-level cataloging specifications).
u - Unknown
Used by an agency receiving or sending data with a local code in Leader/17
cannot adequately determine the appropriate encoding level of the record. Code
u thus replaces the local code. Not used in newly input or updated records.
18 - Descriptive cataloging form
One-character alphanumeric code that indicates characteristics of the descriptive
data in the record through reference to cataloging norms. Subfield ‡e
(Description conventions) of field 040 (Cataloging Source) may contain additional
information on the cataloging conventions used.
a - AACR 2
Descriptive portion of the record and the choice and form of entry of the
access points are formulated according to either the second edition of the
Anglo-American Cataloguing Rules, 2nd Edition (AACR 2) or
cataloging manuals based on AACR 2, which follow ISBD in their descriptive
cataloging sections. The punctuation practices of ISBD apply.
i - ISBD
Descriptive portion of the record is formulated according to the descriptive
and punctuation provisions of ISBD. Heading forms are not formulated according
to AACR 2.
u - Unknown
Institution receiving or sending data in Leader/18 cannot adequately determine
the appropriate descriptive cataloging form used in the record. May be used in
records converted from another metadata format.