초록 ▼

A grammar programming language ("GPL") compiler compiles each rule in a natural language grammar into a separate function that can be invoked by a translation system to apply the rule to a representation of a natural language expression. The GPL compiler can output the functions for the rules as sou

A grammar programming language ("GPL") compiler compiles each rule in a natural language grammar into a separate function that can be invoked by a translation system to apply the rule to a representation of a natural language expression. The GPL compiler can output the functions for the rules as source code for a standard computer programming language to be further compiled into object code that can be directly executed by a computer processor. The GPL compiler can also generate special functions for each rule to enable multi-layered operations on the representations and to handle the processing of representations of ambiguous expressions.

대표청구항 ▼

A grammar programming language ("GPL") compiler compiles each rule in a natural language grammar into a separate function that can be invoked by a translation system to apply the rule to a representation of a natural language expression. The GPL compiler can output the functions for the rules as sou

A grammar programming language ("GPL") compiler compiles each rule in a natural language grammar into a separate function that can be invoked by a translation system to apply the rule to a representation of a natural language expression. The GPL compiler can output the functions for the rules as source code for a standard computer programming language to be further compiled into object code that can be directly executed by a computer processor. The GPL compiler can also generate special functions for each rule to enable multi-layered operations on the representations and to handle the processing of representations of ambiguous expressions. gation information systems includes a global positioning satellite (GPS) receiver. 7. The system claimed in claim 6, wherein: said processing system estimates a first amount of time for said first vehicle to reach a convergence point and a second amount of time for said emergency vehicle to reach said convergence point and determines whether both of said first and second amounts of time are less than a predetermined amount of time; and said warning system provides said indication if said processing system determines said vehicles will both reach said convergence point within said predetermined amount of time. 8. The system claimed in claim 1, wherein: said processing system predicts whether said first and emergency vehicles will converge; and said warning system provides said indication if said processing system determines said vehicles will converge. 9. The system claimed in claim 1, wherein: said system further comprises a base station at a fixed geographic location receiving signals transmitted by said emergency vehicle and transmitting signals to said first vehicle; and said base station transmits to said first vehicle information identifying said destination point of said emergency vehicle; and said processing system determines said convergence point in response to information including said destination point. 10. A method for alerting a driver of a first vehicle of an approaching emergency vehicle, said first and emergency vehicles being land vehicles for operation on public streets, said method comprising the steps of: providing first vehicle navigation information in said first vehicle including geographic position, direction and speed of said first vehicle; providing emergency vehicle navigation information in said emergency vehicle including geographic position, direction and speed of said emergency vehicle; transmitting at least a portion of said emergency vehicle navigation information from said emergency vehicle; receiving movement information associated with movement of said emergency vehicle in said first vehicle, said movement information including at least a portion of said emergency vehicle navigation information; determining whether said first and emergency vehicles are likely to converge within a predetermined proximity of one another in response to said first and emergency vehicle navigation information, said determining step being performed by a processing system in said first vehicle, wherein said step of determining whether said first and emergency vehicles will converge comprises the step of predicting whether said first and emergency vehicles will converge in response to information including a destination point of said emergency vehicle; and providing a human-perceptible indication in said first vehicle if said determining step determines said first and emergency vehicles are likely to converge within a predetermined proximity of one another. 11. The method claimed in claim 10, wherein said emergency vehicle is selected from the group consisting of: firefighting vehicle; police vehicle; rescue vehicle; and ambulance. 12. The method claimed in claim 10, further comprising the step of receiving said emergency vehicle navigation information transmitted by said emergency vehicle and re-transmitting said emergency vehicle navigation information to said first vehicle. 13. The method claimed in claim 10, wherein said step of determining whether said first and emergency vehicles are likely to converge within a predetermined proximity of one another comprises the step of determining a location of a road intersection. 14. The method claimed in claim 10, wherein said warning step comprises the step of providing a visual display indicating said position of said first vehicle relative to said position of said emergency vehicle. 15. The method claimed in claim 10, wherein said step of providing first vehicle navigation information and said step of providing emergency vehicle navigation information comprises using global positioning satellite (GPS) receivers. 16. The method claimed in claim 10, wherein said step of determining a position and direction of said emergency vehicle relative to said first vehicle comprises the steps of: predicting whether said first and emergency vehicles will converge; and providing said indication if said processing system determines said vehicles will converge. 17. The method claimed in claim 16, wherein said step of predicting whether said first and emergency vehicles will converge comprises the step of estimating a first amount of time for said first vehicle to reach a convergence point and a second amount of time for said emergency vehicle to reach said convergence point and determining whether both of said first and second amounts of time are less than a predetermined amount of time. 18. The system claimed in claim 10, further comprising the steps of: receiving signals transmitted by said emergency vehicle at a base station at a fixed geographic location; transmitting signals from said base station to said first vehicle, including information identifying said destination point of said emergency vehicle. 19. An emergency vehicle warning system installed in a motor vehicle for operation on public streets, said system comprising: a navigation information system in said motor vehicle providing first vehicle navigation information including geographic position and at least some data indicating future geographic position of said motor vehicle; a receiver in said motor vehicle receiving emergency vehicle navigation information associated with movement of an emergency vehicle, said emergency vehicle navigation information including geographic position and at least some data indicating future geographic position of said emergency vehicle; a processing system in said motor vehicle determining whether said motor vehicle and said emergency vehicle are likely to converge within a predetermined proximity of one another in response to said first and emergency vehicle navigation information; and a warning system providing a human-perceptible indication in said motor vehicle if said processing system determines said motor vehicle and said emergency vehicle are likely to converge within a predetermined proximity of one another. 20. The system claimed in claim 19, wherein said navigation information system includes a global positioning satellite (GPS) receiver. 21. The system claimed in claim 19, wherein said processing system further determines whether said motor vehicle and said emergency vehicle are likely to converge based on street data regarding the location of streets within the vicinity of said motor vehicle. 22. The system claimed in claim 19, wherein said processing system predicts whether said motor vehicle and said emergency vehicle will converge in response to information including a destination point of said emergency vehicle.