A database or file is a collection of information on a particular subject and contains a number of separate documents all with the same structure. Each database on Dialog is identified by a number (., . Patents Fulltext is “File 654”).The content in a database may be an online version of something previously published in print, entirely new material or a compilation of information appearing in many different publications. Databases are sometimes divided up into several file segments. Each file segment, most commonly divided by dates of coverage, contains a different piece of the database. An example is EMBASE®: File 72 covers 1993 to the.
