step 3. SUBFIELDS is marked of the SUBFIELD Requirements and you may DELIMITERS
An effective subfield: Extremely fields incorporate multiple relevant bits of studies. Every type of information in the job is named an excellent subfield , each subfield was preceded from the a good delimiter-subfield code combination . Areas 001 owing to 009 do not have subfields.
Such, the field having your own term heading comes with an effective subfield getting your own title, numeration, titles and you may dates on the name, certainly one of several others.
An excellent subfield password: Subfield codes try you to definitely lowercase page (periodically a number) preceded because of the good delimiter. A beneficial delimiter was a characteristics used to independent subfields. For every subfield code means what type of investigation observe it. (Per profession in the MARC 21 authority style, the fresh new MARC 21 records lists and you may refers to the latest appropriate subfield codes.)
In the a lot more than example, brand new subfield codes was $a for personal name, $b to own numeration, $c having titles or other terms and conditions associated with a name, and you will $d having times for the a reputation.
A great delimiter: Different applications have fun with additional characters to depict new delimiter towards the the display screen or into printouts. Examples are a double dagger ( ), a keen “during the signal” (), a money indication ($), a keen underline ( _ ), or even the graphic icon ” “. In this guide the new dollar indication ($) can be used since delimiter part of the subfield password.
step one. The latest authority checklist content.
An expert number is perfect for per licensed particular a beneficial going. For brands, probably one of the most widely used power data files is the Library off Congress Label Authority File (otherwise LCNAF). One to document can be used in this file having instances. The whole document can be found about Cataloging Shipping Solution (otherwise Cds) or possibly sought after free online during the: To have information otherwise geographic names, typically the most popular subject power document is the LCSH. It is supplied by Cds in publications and you can digital means. There are many different other subject supposed lists, including the Sears Directory of Topic Headings and Art and Architecture Thesaurus . The type of a topic going will be fits one on these listings or realize their laws to own design.
All the headings are among the pursuing the items: brands , name/label combos , uniform titles , otherwise sufferers . Examples of name headings are:
A reputation/identity supposed includes each other a reputation and a subject away from a work. The name portion contains an individual, corporate, fulfilling, otherwise legislation term. Brand new term portion has got the term in which a product or service otherwise a sequence is going to be identified to possess cataloging objectives. It is particularly employed for antique work that have been had written lower than various other headings through the years. A good example of a name/identity going are:
What exactly is a beneficial MARC Power Number
An interest going is a single label, phrase, or a group of terms and conditions. The fresh new level on subject is dependent on the first title or terms regarding heading — thing, genre/mode, geographic, chronological, personal term, business name, conference identity, or title. The other terminology throughout the supposed can be found in certain subfields you to are called subdivisions.
MARC 21 power facts have two types of cross recommendations one to sometimes head a user away from an enthusiastic unauthorized heading to a 3rd party going (these are named “see records” and make use of 4XX tags) otherwise from licensed going to a special (speaking of titled “select as well as references” and use 5XX tags). Genuine mix records usually are not sent clearly in authority facts, although not. Alternatively, variation form and you may associated titles is “traced” throughout the authority listing to your signed up form. Tracing mix sources instead of and come up with independent expert ideas to have references allows efficient and you will specific display screen out-of expert recommendations because of the catalogs — together with users understand the advice about means that is right for all of them. Cross reference displays are able to feel created by options hence merge brand new belongings in a great tracing reference field and also the 1XX going realm of a record.