Schema alignment, record linkage and data fusion are presented w.r.t to Big Data characteristics (volume, velocity and variety). Knowing the high value carried by data in general and thus by Big Data, it is not surprising therefore that Chief Information Officers (CIOs) are interested in it analytics as technological. If initially web pages and traditional databases were the raw materials respectively for search engine companies and other businesses, now it has been mixed with large sets of miscellaneous, heterogeneous and unstructured data. It implies that tools and techniques have to be designed to disambiguate it before putting it together to master and manage data of organizations. Our work is similar to in the approach. We discuss challenges and opportunities of semantics in the age of Big Data and present the supply chain to handle it. Therefore, this article defines Big Data (Section 2), briefly discusses its management (Section 3) and finally tackles Big Data and semantics challenges and opportunities (Section 4).