Outline ◆ Motivation Why do we need big data integration? How has"small"data integration been done? Challenges in big data integration ◆ Schema alignment ◆ Record linkage ◆ Data fusion ◆ merging topICsOutline  Motivation – Why do we need big data integration? – How has “small” data integration been done? – Challenges in big data integration  Schema alignment  Record linkage  Data fusion  Emerging topics 4