Social Tagging in the Web 2.0 Environment: Author Vs. User Tagging

Abstract

Social tagging increasingly attracts the attention of information scientists. Much research has focused on large-scale assessment of tag sets in systems. The reasons for tagging remain uncertain. To date, the library and information science (LIS) field has not explicitly explored 5 the differences between author-supplied metadata (endo-tagging) and usersupplied metadata (exo-tagging). This article reviews a number of studies on social tagging and recommends further user-centered research into motivation; proposed research could be carried out in conjunction with studies focusing on the different reasons for endo- and exo-tagging.