Linked Data is about using the Web to connect related data that wasn't previously linked, or using the Web to lower the barriers to linking data currently linked using other methods. More specifically, Wikipedia defines Linked Data as "a term used to describe a recommended best practice for exposing, sharing, and connecting pieces of data [5], information [6], and knowledge [7]on the Semantic Web using URIs [8] and RDF [9]."
[10]
Additional related info at: http://linkeddata.org/ [11]
Links:
[1] http://pulse.veltsos.com/category/it/data
[2] http://pulse.veltsos.com/category/it/semantic-web
[3] http://pulse.veltsos.com/category/it/standards
[4] http://pulse.veltsos.com/category/it/web
[5] http://en.wikipedia.org/wiki/Data
[6] http://en.wikipedia.org/wiki/Information
[7] http://en.wikipedia.org/wiki/Knowledge
[8] http://en.wikipedia.org/wiki/URI
[9] http://en.wikipedia.org/wiki/Resource_Description_Framework
[10] http://linux.philosweb.com/drupal/system/files/moz-screenshot_2.png
[11] http://linkeddata.org/