Good subfield: Extremely areas have numerous relevant pieces of investigation. Every type of information within the profession is known as a beneficial subfield , each subfield are preceded by a good delimiter-subfield code consolidation . Fields 001 through 009 don’t have any subfields.
Particularly, the field getting a personal identity going is sold with an effective subfield getting a personal title, numeration, titles and you may dates of the identity, certainly many others.
An excellent subfield code: Subfield requirements was one to lowercase letter (periodically lots) preceded by an effective delimiter. A beneficial delimiter was a characteristics regularly independent subfields. For each subfield password indicates what kind of data pursue it. (For each field in the MARC 21 power structure, brand new MARC 21 records lists and you may identifies the new legitimate subfield requirements.)
Throughout the significantly more than example, the latest subfield rules is actually $a for personal term, $b to have numeration, $c getting headings or other terms with the a reputation, and you can $d having schedules with the a name.
A great delimiter: Different applications use various other emails so you’re able to portray the newest delimiter for the the latest monitor or for the printouts. Examples is a dual dagger ( ), an “during the indication” (), a dollar indication ($), a keen underline ( _ ), or perhaps the graphic symbol ” “. Within book the money indication ($) can be used while the delimiter portion of the subfield code.
step 1. The new power record content.
An authority record is made for each signed up sort of a beneficial supposed. Having brands, one of the most widely used authority data is the Library off Congress Title Power File (otherwise LCNAF). One file is employed within this document to own advice. The whole file can be found on Cataloging Shipments Service (or Dvds) or possibly sought out online within: Having subjects or geographical labels, the most popular subject power document ‘s the LCSH. Its offered by Dvds on the net and electronic setting. There are numerous almost every other subject supposed directories, like the Sears Range of Topic Titles and the Art and Structures Thesaurus . The form of a subject heading is to match you to within these directories otherwise pursue its rules for structure.
Most of the headings are among the adopting the brands: brands , name/title combos , uniform headings afroromance app , or subjects . Samples of identity headings tend to be:
A reputation/label going consists of each other a reputation and you may a concept of a-work. The name portion contains an individual, corporate, meeting, otherwise jurisdiction title. The brand new name piece comes with the term where something or a sequence is to be identified for cataloging purposes. Its particularly employed for antique performs which were penned significantly less than some other titles through the years. A good example of a name/name going was:
What is actually a beneficial MARC Authority Number
An interest going could be just one identity, keywords, or a team of terminology. The fresh level towards the subject is founded on the original title or terms regarding the going — point, genre/mode, geographical, chronological, personal identity, corporate title, fulfilling name, or label. The other conditions on going come in specific subfields you to definitely are called subdivisions.
MARC 21 power information consist of two types of cross records one to often lead a person from an enthusiastic unauthorized going to an authorized heading (talking about called “find references” and use 4XX labels) or from just one authorized maneuvering to a special (talking about named “come across as well as sources” and make use of 5XX tags). Actual cross records usually are not carried explicitly inside the expert records, but not. As an alternative, version mode and you may associated headings try “traced” about authority list to the registered setting. Tracing cross sources rather than to make separate power records having sources enables successful and appropriate display regarding power recommendations of the catalogs — and the users comprehend the advice throughout the mode which is suitable for all of them. Cross reference screens are able to be made by possibilities hence merge the latest belongings in a great tracing site job plus the 1XX going field of accurate documentation.
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