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% Classic intro vs abstract issues here.  Knowledge graphs provide an opportunity to expand the notions our understanding  of how knowledge can be managed on the web and how that knowledge is can be  distinguished from more conventional web-based  data publication schemes like such as  Linked Data \cite{bizer2009linked}. Knowledge In recent years knowledge  graphs have become more grown increasingly  prominent in through  commercial and research applications on the web. Google was one of the first to promote something explicitly labeled identified  as a ``knowledge graph,'' \cite{singhal2012introducing} and many other organizations have since followed the term both in the literature and in less formal communication. Wewill  review the last known formal definition of knowledge graphs, knowledge graph analysis and construction algorithms, and popular commercial and research knowledge graphs in the literature. These new knowledge graphs are not strictly adhering to original knowledge graph theory, but instead have followed a looser, more operationally convenient definition.  We will in turn present a more descriptive view of what knowledge graphs currently are, and also discuss what they can become in the future.