"Where the data are coming from?" Ethics, crowdsourcing and traceability for Big Data in Human Language Technology

Based on the experience gained on the observation of the corpora developement in HLT, the authors want to warn the Big Data community about some recent usage of hu-man computation. For instance, the growing use in the HLT community of crowdsourcing methods, and especially of microworking retributed crowsourcing platforms, lead to many ethical, economical and juridical concerns. The au-thors want also to foster some behaviours, especially con-cerning traceability, implemented in the form of a charter, the Ethics and Big Data Charter .