Natural language processing and query driven information retrieval

In a digital computer, the method of processing a natural language expression entered or downloaded to the computer that includes (1) identifying in the expression expanded subject, action, object components that includes at least four components, subject, action, object (SAO) components and at least one additional component from the class of preposition, indirect object, adjective, and adverbial eSAO components (2) extracting each of the at least four components for designation into a respective subject, action, object field and at least a preposition field, indirect object field, adjective field, and adverbial field, and (3) using the components in at least certain ones of said fields for at least one of (i) displaying components to the user, (ii) forming a search pattern of a user request for information search of local or on-line databases, and (iii) forming an eSAO knowledge base. A constraint field can also be provided to accept non-classified components.