Data assets, such as streams, databases, spreadsheets, or other data sources or types, are identified and representations of the data asset are stored. The representation of a data asset includes a schema used by the data asset, a location of the data asset, and keywords or other descriptive information. The representations of each data asset are indexed, and a search interface is provided that allows users to search for relevant data assets. In addition, dependencies, or other relationship information, among the various data assets is maintained and is used to generate a graph that shows the interrelatedness of the data assets. The graph can be explored by users to select data assets, and used to alert users when a change has been made to a data asset that may affect a data asset that they have used.