Abstract: Key information is locked within unstructured or semi-structured electronic documents or structured databases. Current user interfaces are either designed for information professionals and require training and high skill levels, or provide access to single structured data sources. Query suggestion technology provides a way that occasional users can get high value from unstructured or semi-structured data or heterogeneous structured data, or a combination of unstructured or semi-structured and structured data. In contrast to search technology, the user obtains structured results, that can be manipulated similar to spreadsheets, or via interactive visualization. Queries suggestions are ranked based on the terms or concepts entered by the user in addition to standard ranking methods such as ranking by frequency of usage.