The databases are broadly distributed in two major group’s viz.
full-text and the structures, based on the category of data contained. Ī full-text database is generally a set of documents in which indexes are created to facilitate their fast search. This type of database is commonly run by publishers of magazines and books, patent offices for patents or academic institutions. The largest database of this type on this globe is definitely operated by Google, in which documents and other accessible files are uploaded on the internet in the form of websites. On the other hand, structured databases normally include a set of tables that contain records or rows, all of which have the same structure well defined by a set of fields or columns. The Chemical Abstracts Service Registry Number (CAS RN) is an example of the primary key for the structure in the REGISTRY database.Įach record is always assigned a unique “ID” or “Number” called as identifier or the primary keys, which are easily referenced. Structured databases are generally classified into two large groups in terms of its contents as bibliographic and factographic.
#Review for idatabase full#
The bibliographic databases usually do not have the full text of a document, however it records information about a single publication, patents, and similar documents. Typical fields in bibliographic records are – author, article title, journal name, volume, issue, year of publishing, pages, etc. The Digital Object Identifier (DOI) is a comparatively new parameter, which describes the distinctive placement of a document on the Web.
0 kommentar(er)
