Disclosed is an exemplary computer program application, system and method for a unified approach to managing data from heterogeneous sources. The system includes a central, semantic data storage basing on a directed labeled graph model, a module for accessing data sources by drawing access and mapping configuration from the data storage and loading the resulting data into the data storage and a unified user interface that treats each graph node in the data storage as a separate term, visualizes and modified the term's context in the data graph using configurable user interface widgets.