This book constitutes the thoroughly refereed post-conference proceedings of the First COST
Action IC1302 International KEYSTONE Conference on semantic Keyword-based Search on Structured
Data Sources IKC 2015 held in Coimbra Portugal in September 2015. The 13 revised full
papers 3 revised short papers and 2 invited papers were carefully reviewed and selected from
22 initial submissions. The paper topics cover techniques for keyword search semantic data
management social Web and social media information retrieval benchmarking for search on big
data.
