Position of arrival of a Web page in the result pages of a research performed on research motors.

Fact to show (many pages of) a Website in the index of research motors, do not mix up with positioning. This term is also employed as part of the inscription of a Website on a directory.

Software which goes through the web of page in page by borrowing links hypertexts which are in them, and analyses and indexes contents in a database. He acts for a research motor.

Text file of small size put in the root directory of a Website forbidding the access of certain directories of the site in a robot. It is used when the webmaster does not wish that certain pages of his site are indexed by research motors.

Abbreviation of Really Simple Syndication, a way to extract from Website of contents regularly put in day. A file RSS is a simple text file in the format XML including the short description of the contents of the site.