The present Internet and Web technologies have been endowed with number of features which represent Web 2.0 qualities. For example, video sharing website ¿YouTube¿ allow users to share visual content with others, classify it through self defined ¿tags¿ and post comments. Document sharing sites like ¿Academia.edü, ¿Scribd¿, ¿GoogleDocs¿, etc. allow users to share textual content with others. Social bookmarking sites like ¿Delicious¿, and ¿CiteULike¿ allow users to share personal bookmarks... Mehr