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Social networks have emerged from niche existence to a mass phenomenon. Nowadays, their fundamental concepts, such as managing personal contacts and sharing profile information, are increasingly harnessed for businesses in professional environments. Similar to service-oriented networks, they allow flexible discovery on demand and loose coupling of participants. Establishing social links facilitates cooperation and enables selective sharing of information. Intuitively, one shares moredoi:10.1109/wi-iat.2011.18 dblp:conf/webi/SkopikSD11 fatcat:dmomtuh2abej7ldjxhjcft37bu