2016 Volume 7, Number 3 ACM Journal of Data and Information Quality Article 9 (26 pages) Article 10 (3 pages) Article 11 (4 pages) Article 12 (3 pages) Article 13 (4 pages) Article 14 (22 pages) F. Chiang S. Sitaramachandran V. Maltese F. Giunchiglia J. Gelernter J. Jha L. Berti-Equille M. L. Ba G. Haralabopoulos I. Anagnostopoulos S. Zeadally C. D’Urso Unifying Data and Constraint Repairs Search and Analytics Challenges in Digital Libraries and Archives Challenges in Ontology Evaluation Veracity of Big Data: Challenges of Cross-Modal Truth Discovery The Challenge of Improving Credibility of User-Generated Content in Online Social Networks EXPERIENCE: Glitches in Databases, How to Ensure Data Quality by Outlier Detection Techniques Research Paper ACM Journal of Data and Information Quality Vol. 7 • No. 3 • 2016 Articles 9-14 Challenge Papers Experience Paper