853-855  Captions and Pattern--General Information (R) 

Compressibility and expandability. The first indicator position contains a value that indicates the compression or expansion capability of the 853 or 854 field.

Undefined. The 1st indicator postition is undefined and contains a blank ( ).

Caption evaluation. Completeness of the caption levels and whether the captions used actually appear on the bibliographic item.

Undefined. The 2nd indicator postition is undefined and contains a blank ( ).

The caption for the highest level of enumeration. The designation for an unnumbered (e.g., new ser.) or a numbered (e.g., ser. 5) series is considered part of the caption.

The caption for the second level of enumeration.

The caption for the third level of enumeration.

The caption for the fourth level of enumeration.

The caption for the fifth level of enumeration. Subfield ǂe is unlikely to be used in fields 853, 854, or 855.

The caption for the sixth level of enumeration. Subfield ǂf is unlikely to be used in fields 853, 854, or 855.

The caption for the highest level of an alternative numbering scheme.

The caption for the second level of an alternative numbering scheme.

The caption for the highest level of chronology.

The caption for the second level of chronology.

The caption for the third level of chronology.

The caption for the fourth level of chronology.

The caption for an alternative numbering scheme.

Explanatory note citing the specific year and issue used to prepare the regularity pattern coding expressed in the field.

Caption that describes the type of unit (e.g., annual buyer's guide, subject index) in the enumeration hierarchy when it has no associated sequence numbering. When used, subfield ǂo immediately follows the caption to which it refers.

The numeric value that represents the number of physical parts or pieces received per issuance. This technique allows for describing the behavior of items issued in parts. Subfield ǂp is only coded in cases where the number of parts or pieces is different from the publishing frequency expressed in subfield ǂw. All codable frequency information should be placed in subfield ǂw.

The number (or the code var or und) that specifies the total number of parts that comprise the next higher level of enumeration. May be used with each level of enumeration except the first level (subfield ǂa or subfield ǂg) because there is no higher level. When it is used, subfield ǂu follows the caption subfield for the enumeration level to which it applies.

n - Number of parts. Total number of parts that constitute the next higher level of enumeration for example, a quarterly publication requires 4 issues to make 1 volume. Because subfield ǂu is a variable length, no leading zero is used for a single-character number.

Combined issues are counted as one part.

var - Varies. The total number of parts that constitute the next higher level of enumeration varies so much that a specific number in subfield ǂu would be meaningless.

und - Undetermined. The next higher level of enumeration is known to have parts but the number of parts is unknown.

One-character code that indicates whether the number of the described level consists of continuously incrementing numbers or numbers that restart at the completion of the unit.

May be used with each level of enumeration except the first level (subfield ǂa or subfield ǂg). Subfield ǂv follows the caption subfield and the subfield ǂu for the enumeration to which it applies.

One-character alphabetic code or a number that indicates the publication frequency of the item. Subfield ǂw is not related to a specific caption. It is input following the last chronology caption used. Specific publishing pattern information is contained in the subfield ǂy, including exceptions to the frequency coded in this subfield. Subfield ǂp is also used when both a frequency code and number of pieces per issuance need to be recorded for multipart titles.

Codes. Use for a publishing pattern that has a fundamental periodicity.

Number. Used to specify the number of issues per year when no codable periodicity exists. Because subfield ǂw is variable in length, no leading zero is used for a single-character number.

One or more two- or four-character numeric codes that indicate the chronological point at which the highest level increments or changes.

Codes. A two-character code identifies the month or season of change. A four-character code in the pattern mmdd (2 for the month and 2 for the day) identifies the month and day of change. A month or day code of less than two digits is right justified and the unused position contains a zero.

Month

Day

Season

When there is more than one change in a year for example, 12 numbers per year are issued as 2 volumes per year, all of the calendar change codes are contained in one subfield ǂx and the codes are separated by a comma. Subfield ǂx is not related to a specific caption. It is input following the last subfield.

The codes that describe the regularity of the publishing pattern coded in subfield ǂw. The subfield may be structured as either a chronology type or enumeration type. Both types begin with a publication code.

Publication Code. First one-character code in both the chronology type and enumeration type indicates whether the subsequent codes refer to the publication or the non-publication of part(s) of the item or the combination of either enumeration or chronology elements.

Chronology Code. Designation of the part of the item for which regularity pattern information is provided. Multiple codes are separated by a comma. A slash ( / ) is used to designate combined issues.

Two-character alphabetic or numeric codes are used for days, weeks, months, and/or seasons. A four-character code is used to indicate a year or year combination. A code of less than two digits is right justified and the unused position contains a zero.

Chronology Type and Code Patterns:

Pattern Description:

Pattern Values:

Days of the week - dd

Week - ww

Month - MM

Day of Month - DD

Week of month - WW

Season - SS

Enumeration Type

The enumeration is structured as:

<Publication Code><Enumeration Code Definition><Enumeration Code>,<Enumeration Code>, ...

Enumeration codes may occupy the second and third positions after subfield ǂy to provide for regularity patterns for items that use only enumeration for sequencing and/or those items whose sequencing must be specified separately when combinations occur.

Enumeration Code Definition - Second code in the subfield indicates whether the subsequent codes represent enumeration rather than chronology. When code e is used, an additional numeric code is added to indicate the level of enumeration to which the regularity applies.

e1 - Enumeration, 1st level

e2 - Enumeration, 2nd level

Enumeration Code - Enumeration code following the enumeration code definition indicates the designation of the issues of the item for which regularity pattern information is provided. Multiple designations are separated a comma. A slash ( / ) is used to designate a combined issue.

Presence of continuous numbering (subfield ǂv, code c) in conjunction with an enumeration code signals the combination of specific numbers in the sequence of specific issues. Because of the continuous numbering, the actual enumeration values cannot be used to express the enumeration in subfield ǂy. Enumerative values must be represented in terms of the number of issues expected to be published to allow combined issue prediction to occur.

Automated systems may construct algorithms to predict the second level of continuous enumeration based on the starting value of the second level of enumeration at the beginning of the subscription cycle.

There may be multiple ways to express the same pattern using the defined publication, chronology, and enumeration codes. For instance, the pattern may be expressed enumerating all published issues, or enumerating the omitted issues. The institution should strive for the most succinct method possible that accurately records the pattern.

Regularity pattern codes, along with additional examples are maintained at the Library of Congress and are available online at: Chronology and Enumeration Types with Code Patterns (https://www.loc.gov/marc/chrono_patterns.html). Questions on coding patterns or establishing new ones should be addressed to the Network Development and MARC Standards Office, Library of Congress (https://www.loc.gov/marc/ndmso.html).

Six-character code string used to designate the numbering scheme used on a publication. The codes allow for recording different numbering schemes at different levels of enumeration. Subfield ǂz follows the enumeration subfield to which it applies.

Type of designation - First one-character code indicates whether the numbering is a number, letter, or combined (number first or letter first). Combined should only be used when one of the elements is a constant designation (e.g., 1a, 2a, 3a), rather than actually two different levels of enumeration (e.g., 1a, 1b, 1c).

a - Number

b - Letter

c - Combined, number first

d - Combined, letter first

e - Symbol or character

Case - Second one-character code indicates if a numbering scheme is conveyed as alphabetic characters and applies both to those coded in the previous position as b or to Roman numerals.

a - No case

b - Lower case

c - Upper case

d - Mixed case

Script Code/Type Code - Third through sixth positions indicate either the script used in the numbering scheme or, for numerals or symbols that are not in alternate scripts, the type of numeral or symbol used.

The script code is a four-character code from the list at: ISO 15924 Registration Authority (https://http://http://www.unicode.org/iso15924/).

The type code is as follows:

an - Arabic numeral

rn - Roman numeral

sy<Symbol> - Symbol

Note: Trailing blanks ( ) do not appear in OCLC online displays.

MARC code that identifies the source of the abbreviations used in the captions of the field. Code from Captions Abbreviation Source Codes (https://www.loc.gov/standards/sourcelist/caption-abbreviation.html).

The range of volumes or dates to which the field applies. For information about subfield ǂ3, see Control Subfields.

Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in the OCLC online displays. Do not add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields

For information about subfield ǂ8, see Control Subfields.