US Patent 9798829 Data graph interface

Some implementations provide a user interface that allows non-technical users to import, create, and maintain a knowledge document. The knowledge document may include links to other knowledge documents or links to public data graphs. For example, a method may include generating data used to display tabular data to a user, a first column of the tabular data being associated with a first entity type and non-heading rows in the tabular data representing information for entities of the first entity type. The method may also include permitting the user to select a second column of the tabular data and provide a second entity type as an object type to be associated with a relationship represented by the second column. The method may include generating an entity in the knowledge document of the second entity type and linking an entity of the first entity type to the generated entity by the relationship.