A brief summary or description of the essential content from the source document.


DOI (Digital Object Identifier)

The Digital Object Identifier (DOI®) is a system for permanently identifying and exchanging intellectual property in the digital environment.

Example: DOI: 10.1134/S1061920808010020

See for more information.

DOI® is a registered trademark of the International DOI Foundation.

A DOI number can be associated with an article, a book, a book chapter, a data study document, and other document types.



Items in a library collection. For example, a library's online catalog would show whether the source publication is held in the library's collection.


Intellectual Property

Refers to creations of the mind such as inventions, trademarks, literary and artistic works, symbols, images, architectural designs, and so forth. Patents are one way of protecting intellectual property; copyrights and trademarks are other ways of protecting intellectual property.



The International Standard Book Number is a unique identifier that identifies a work's national, geographic, or language, along with the publisher, title, edition, and volume number. The format is a 10-digit number that contains 3 hyphens (-). The last digit is a check character, which may be a number or X. The position of the hyphens can vary for each ISBN. Example: 2-7380-1000-8



The International Standard Serial Number is a unique number that identifies the source publication. The format is four numbers, a hyphen (-), three numbers, and then a check character that may be a number or X. Example: 0002-9262



Keywords are words or phrases that describe the content of an article. They are provided by the author(s) of the source article. They are taken directly from source article and are identified as keywords in the source articles.


Keywords Plus

KeyWords Plus® are index terms automatically generated from the titles of cited articles. KeyWords Plus terms 

must appear more than once in the bibliography and are ordered from multi-word phrases to single terms.

KeyWords Plus augments traditional keyword or title retrieval.


Marked List

A list of records that you marked from either the Results page or the Full Record page. Once you add records to the Marked List, you can later print, save, e-mail, order, or export some or all of those records. You have the option to select records from the Total Records table to output or you can select records from a specific product database.


Search Aid

Search aids are tools that allow you to select predefined names, terms, or codes and automatically add them with the appropriate syntax to a search query. Search aids allow you to quickly and easily achieve consistent search results.


Set Combination

A set combination consists of two or more set numbers that you can run as a unique search query. For example, #1 AND #3 combines the results of set 1 and set 3 to form a single query. Set numbers appear under the Set column in the Search History table.

You can also enter a single set number alone to refresh the results of a previous search. In this instance, you may also want to change the timespan, languages, document types, literature types, and Taxa Notes.


Source Document

An article, patent, book, or other work represented by a record in the product database. May also be referred to as "source publication" or "source record".