Workshops of JIST 2014 Preface The workshops are held in conjunction with the conference: 4th Joint International Semantic Technology Conference (JIST 2014), which takes place during November 9-11, 2014, Chiang Mai, Thailand. The aim of the workshops is to provide an opportunity for participants for in- depth discussion of current and emerging topics of the semantic technologies. This year, we accepted two workshop proposals with the goal of exploring focused issues across various themes. All submissions to the workshops were reviewed by the program committees of the workshops. In total, 12 papers are included in the proceedings. We believe that the workshops would foster interactions between different communities within the scope of JIST. We would like to thank the organizers of the two workshops and the authors of the papers, the workshop program committee members, and JIST 2014 local organizers for their effort to make this happen. Thatsanee Charoenporn, Burapha University, Thailand Sasiporn Usanavasin, SIIT, Thailand JIST 2014 Workshop Co-chairs