A great subfield: Most fields consist of numerous relevant pieces of studies. Each kind of data into the industry is known as a great subfield , and every subfield are preceded because of the a great delimiter-subfield password combination . Areas 001 compliment of 009 haven’t any subfields.
For example, the field for your own term supposed includes an excellent subfield to have an individual term, numeration, headings and you can schedules for the name, certainly one of many others.
An effective subfield code: Subfield rules is actually that lowercase letter (sometimes a number) preceded by the a delimiter. A beneficial delimiter was a nature always independent subfields. For each subfield code implies what type of data uses they. (For every single community regarding MARC 21 authority format, the brand new MARC 21 paperwork directories and you can refers to the legitimate subfield requirements.)
Throughout the over example, the latest subfield codes is actually $a for personal identity, $b for numeration, $c to possess headings or other terminology regarding the a name, and $d having times associated with a reputation.
A beneficial delimiter: Additional programs explore various other letters to show the newest delimiter into the the monitor otherwise on printouts. Advice are a double dagger ( ), an « during the signal » (), a money sign ($), an enthusiastic underline ( _ ), or perhaps the graphic symbol » « . Within this publication the newest dollars signal ($) is utilized because delimiter part of the subfield code.
step one. Brand new authority record stuff.
An authority list is perfect for for every single authorized variety of a supposed. Getting names, perhaps one of the most widely used authority records is the Collection of Congress Label Expert Document (otherwise LCNAF). One document is used in this file to own examples. The complete file exists throughout the Cataloging Shipments Provider (or Dvds) or possibly wanted free online within: To possess subjects otherwise geographical names, the most common topic expert document ‘s the LCSH. It’s provided by Dvds in print and you can electronic setting. There are various almost every other topic supposed listing, for instance the Sears Selection of Subject Titles in addition to Artwork and you will Structures Thesaurus . The form of a subject heading will be match you to definitely on these lists or follow the laws to own build.
All the headings are one of the pursuing the versions: labels , name/term combinations fitness singles Mobile, uniform titles , otherwise victims . Types of title headings tend to be:
A reputation/identity supposed contains both a name and a title out-of a-work. Title portion includes a personal, corporate, fulfilling, otherwise jurisdiction identity. The new identity piece has the label which an item or a sequence is usually to be recognized having cataloging intentions. It’s especially used in vintage works which have been typed not as much as various other headings over time. A good example of a name/label going was:
What exactly is a great MARC Authority Number
A topic heading is generally an individual label, terms, otherwise a group of terms and conditions. The latest tag into topic will be based upon the initial label otherwise terminology on supposed — topic, genre/mode, geographical, chronological, private label, business name, conference label, otherwise identity. One other terms in the supposed come into specific subfields that have been called subdivisions.
MARC 21 expert facts include 2 kinds of mix sources that both direct a user regarding a keen not authorized going to a 3rd party heading (speaking of named « look for references » and use 4XX tags) or from just one authorized maneuvering to yet another (talking about named « get a hold of together with recommendations » and rehearse 5XX tags). Genuine cross recommendations aren’t sent explicitly for the authority details, yet not. As an alternative, variant means and associated titles are « traced » on the expert checklist into authorized setting. Tracing mix references as opposed to and work out independent expert information to possess recommendations enables successful and you may accurate monitor off expert information by catalogs — in addition to users comprehend the advice on the mode which is appropriate for them. Cross-reference displays are able to getting made by expertise and this merge the fresh new items in a great tracing site occupation together with 1XX heading field of an archive.