What is the what is the definition of automatic?

Answer 1

Alt. of Automatical

Answer 2

Automatic indexing is indexing made by algorithmic procedures. The algorithm works on a database containing document representations (which may be full text representations or bibliographical records or partial text representations and in principle also value added databases). Automatic indexing may also be performed on non-text databases, e.g. images or music.

In text-databases may the algorithm perform string searching, but is mostly based on searching the words in the the single document representation as well as in the total database (via inverted files). The use of words is mostly based on stemming). Algorithms may count co-occurrences of words (or references), they may consider levels of proximity between words, and so on.