¿Cuales son las definiciones más corrientes para los siguientes conceptos?
Documenta tus definiciones con los correspondientes URL's.

1) Hypertext:

Hypertext is the presentation of information as a linked network of nodes which readers are free to navigate in a non-linear fashion. It allows for multiple authors, a blurring of the author and reader functions, extended works with diffuse boundaries, and multiple reading paths.
http://www.iath.virginia.edu/elab/hfl0037.html


2) Link:

A link is the traversable connection between two nodes.
http://www.iath.virginia.edu/elab/hfl0043.html

A hypertext link on a web site other than your own that points to your web site. Inbound links are an important part of web site marketing as they can deliver targeted visitors directly from another web site, and can help to improve the ranking position of your web site on engines that use link popularity as a part of their algorithm.
http://websearch.about.com/library/glossary/bldef-inbound-link.htm


3) Lexia:

Lexia is the way Barthes calls hypertxt; denotes a text composed of blocks of text and the electronic links that join them.
http://www.cyberartsweb.org/cpace/ht/jhup/history.html

The lexia is a block of hypertext which is connected to other lexiae through links, which comment upon each other .
http://www.magnesium.net/~gregsamsa/lexiacon/archives/000001.html


4) Node:

A node is an integrated and self-sufficient unit of information, small relative to the complete document. In electronic instances, nodes are often thought of as being small enough to fit on one computer screen.
http://www.iath.virginia.edu/elab/hfl0046.html

Any computer that is hooked up to a computer network.
 http://dict.die.net/node/

       
5) Interactivity:

In computers, interactivity is the dialog that occurs between a human being (or possibly another live creature) and a computer program. In addition to hypertext, the Web offer other possibilities for interactivity. Any kind of user input, including typing commands or clicking the mouse, is a form of input. Displayed images and text, printouts, motion video sequences, and sounds are output forms of interactivity.
http://searchwebservices.techtarget.com/sDefinition/0,,sid26_gci212361,00.html