Abstract: A search query is received that is associated with two or more data sources so that a source-specific query is generated for each data source using a data source definition associated with the corresponding data source and the search query. Thereafter, searches are executed for a first set of data sources using the corresponding source-specific queries. These search results from the first set of data sources are consolidated. In addition, searches are executed for a second set of data sources using the corresponding source-specific queries. These search results from the second set of data sources are then consolidated with the consolidated search results from the first set of data sources. In some implementations, at least one search comprises a main search followed by a sub-search that filters results from the main search. Related apparatus, systems, techniques and articles are also described.