|This article needs additional citations for verification. (July 2016) (Learn how and when to remove this template message)|
|Applied and experimental|
Constraint-based grammars can perhaps be best understood in contrast to generative grammars. A generative grammar lists all the transformations, merges, movements, and deletions that can result in all well-formed sentences, while constraint-based grammars, take the opposite approach, allowing anything that is not otherwise constrained. "The grammar is nothing but a set of constraints that structures are required to satisfy in order to be considered well-formed." "A constraint-based grammar is more like a data base or a knowledge representation system than it is like a collection of algorithms."
Examples of such grammars include
|This linguistics article is a stub. You can help Wikipedia by expanding it.|
None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.
All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.
The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.