Web Annotation

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What is Web Annotation?

A Web annotation is an online annotation associated with a web resource, typically a web page. With a Web annotation system, a user can add, modify or remove information from a Web resource without modifying the resource itself. The annotations can be thought of as a layer on top of the existing resource, and this annotation layer is usually visible to other users who share the same annotation system, making it a type of social software tool.

Web annotation can be used:

* to rate a Web resource, such as by its usefulness, user-friendliness, suitability for viewing by minors.
* to improve or adapt its contents by adding/removing material, something like a wiki.
* as a collaborative tool, e.g. to discuss the contents of a certain resource.
* as a medium of artistic or social criticism, by allowing Web users to reinterpret, enrich or protest against institution or ideas that appear on the Web.
* to quantify transient relationships between information fragments.

[edit] Web annotation systems

Web annotation systems are typically implemented as part of standard web browsers. Those currently in release and under development include:

* co-ment[1] - a free software Web service for uploading or creating on-line texts, submitting them to comments from designated users or the general public, and processing the comments.
* Cozimo[2] - In-browser application sharing for annotating videos and images (free API).
* Diigo - for highlighting text and posting sticky notes on webpages.
* Fleck[3] - add stick-it notes to webpages and share these with other people.
* JumpKnowledge[4] - a free, web-based, cross-browser, registration-optional web page annotation tool.
* Marginalia - open-source, Javascript-based, adds text highlighting and margin note capabilities to web applications.
* pdffiller[5] - Annotate (i.e. fill out) pdf forms through the web.
* Protonotes[6] - by adding 4 lines of JavaScript to your website you can let visitors add sticky notes without having to install plugins or use bookmarklets.
* SharedCopy - AJAX-based web annotation with cache and shorten url with easy sharing functions.
* Shiftspace - has the tag line "an open source layer above any webpage" and is based on the Greasemonkey platform for Firefox.
* Stickis - with toolbars for Firefox and IE. Allows you to attach rich media notes to any web page. See only those from your friends anywhere you browse.
* Wikalong - for Firefox.
* A.nnotate[7] - notes on web pages and uploaded PDF/Word documents attached to highlighted text
* PMOG - The Passively Multiplayer Online Game, uses a form of web annotation to link together websites and players in a web metagame.

Former systems:

* Annotea - a W3C project that tried to establish a standard for web annotation.
* ThirdVoice - a notable system launched in 1999 that had to shut down due to lack of success in April 2001.[8]
* iMarkup Client - iMarkup Client is web page annotation tool allowing notes and markups to be made from within your browser.

[edit] See also

* Folksonomy
* Metadata
* Threaded discussion

[edit] References

* Wiki:WebAnnotation

1. ^ co-ment
2. ^ cozimo
3. ^ Fleck
4. ^ JumpKnowledge
5. ^ pdffiller
6. ^ Protonotes
7. ^ A.nnotate

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