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

1) hypertext:
Hypertext conceives information as nodes and link networks forming navigable paths that can be toured, returned to and referenced.
It is a non-linear way of presenting information as below diagram. Instead of reading or learning about things in the order that predefined by author, editor or publishers, readers of hypertext may follow their own path, create their own order – their own meaning out of the material.
This is accomplished by creating "links" between information (Nodes). These links are provided so that the readers may "jump" to further information about a specific topic being discussed (which may have more links, leading each reader off into a different direction).

http://www.cyberartsweb.org/cpace/ht/thonglipfei/hyper_defn.html

2) link:

The name given to a link that leads to a web page or site that has either moved
or no longer exists. Search engines are directories continually work to remove
dead links from their indexes in order to improve the overall quality of search
results.
 When a web site is redesigned to include new pages and remove old pages, the old pages that remain in search engine listings lead no where and are referred to as "dead links."

http://websearch.about.com/library/glossary/bldef-dead-link.htm

3) lexia: 

The lexia is a block of hypertext which is connected to other lexiae through links, which comment upon each other (some might say, dialogue with each other). Roland Barthes’ definition provides us with an understanding that this is the basic building block of the hypertextual universe: It is the atom, the letter, the point of hypertext. It is viewed nonsequentially from the perspective of the author, sequentially from the perspective of the reader, and is the embodiment of the poststructuralist ideal: brief interconnected segments whose context is provided by the lexiae that surround it in three dimensions.

Here at lexiacon we are about to hyperextend our minimal Latin, in justification of this weblog’s rather stuffy-sounding name: If a lexicon is a list of terms, then a lexiacon should be a list of lexiae, and this lexiacon would be, in its most bare terms, a weblog.

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. Node can be as small as one word or huge till occupy multiple pages.

Other synonyms for node include frame (KMS), work space (StorySpace), card (HyperCard), and lexia (Barthes by way of Landow). On the World Wide Web, a node is simply termed a Web Page.


http://www.cyberartsweb.org/cpace/ht/thonglipfei/node.html

5) interactivity:

Interactivity is "a process whereby students are systematically encouraged to be active participants in their own learning. It is achieved by teaching approaches that engage students in the construction of knowledge."

What one terms as interactivity will vary. In relation to this project interactivity is deemed to be the interaction between a student and the computer which leads directly to meaningful learning. Navigation would not in this definition be termed as interaction as it does not in itself lead directly to the construction of knowledge or meaningful learning.

http://floti.bell.ac.uk/hotpot/interactivity_definition.htm


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