1. A method for presenting relationships between data items in a knowledge model database, comprising: integrating a plurality of data items into a plurality of entity tables in the knowledge model database, the plurality of data items extracted from a plurality of data sources, including a first data source and a second data source; determining relationships between the plurality of data items in the knowledge model database, wherein the relationships include: a direct relationship between first and second data items extracted from the first data source and integrated in different entity tables in the knowledge model database, a field-to-text relationship between a third data item extracted from a third data source and a fourth data item included in a literature table in the knowledge model database, wherein the literature table includes data items extracted from a fourth data source, the fourth data source being a first textual data source that includes the third data item, a transitive relationship between data items extracted from different data sources, wherein the transitive relationship is based on a plurality of direct relationships, a proximity relationship between data items extracted from a fifth data source, wherein the proximity relationship is defined, at least in part, by a proximity between the data items within the fifth data source; displaying, concurrently, a plurality of panels on a display, including: an active panel displaying a selected data item, the selected data item selected from among the plurality of data items, a plurality of entity panels displaying data items related to the selected data item; and displaying relationship indicia on the display indicative of relationship types between the selected data item and the displayed data items, the relationship indicia including direct relationship indicia, field-to-text relationship indicia, transitive relationship indicia, and proximity relationship indicia.