Method and apparatus for expressing time in an output text

1. A computer-implemented method comprising:

identifying, using a processor, a time period to be described linguistically in an output text and one or more linguistic resources for the output text; and

generating, using the processor, a linguistic description of the time period based on a descriptor that is defined by a temporal reference frame of one or more temporal reference frames, the one or more temporal reference frames applicable to the time period and a domain defined by the one or more linguistic resources, the temporal reference frame enabling a greater variation in descriptors for generating the linguistic description than had the descriptor not been defined by the temporal reference frame.

2. A method according to claim 1 , further comprising:

determining, using the processor, the one or more temporal reference frames;

instantiating or aligning, using the processor, the one or more temporal reference frames to the one or more linguistic resources; and

selecting, using the processor, the descriptor defined by the temporal reference frame of the one or more temporal reference frames based on the time period and one or more previously generated linguistic descriptions.

3. A method according to claim 1 , further comprising:

determining, using the processor, a temporal relationship between the time period and the descriptor, wherein the linguistic description is further based on the temporal relationship between the time period and the descriptor, wherein the descriptor specifies a time window that is inclusive of at least a portion of the time period to be described.

4. A method according to claim 3 , further comprising:

verifying, using the processor, the linguistic description using one or more constraints.

5. A method according to claim 1 , further comprising:

identifying, using the processor, another time period to be described linguistically; and

determining, using the processor, a descriptor that is defined by another temporal reference frame of the one or more temporal reference frames.

6. A method according to claim 5 , wherein the descriptor for the another time period is different from the descriptor used for the time period.

7. A method according to claim 1 , wherein each temporal reference frame of the one or more temporal reference frames are partitioned, such that a descriptor is configured to linguistically describe each partition.

8. A method according to claim 7 , wherein the one or more linguistic resources is defined by at least one of a domain model, a current time or a current location.

9. A method according to claim 1 , wherein the time period comprises at least one of a time point or a series of time points.

10. A method of claim 1 , further comprising:

determining, using the processor, that a single descriptor does not specify a time window that is inclusive of the time period to be described linguistically; and

determining, using the processor, two or more descriptors that are defined by a temporal reference frame of the one or more temporal reference frames, wherein the two or more descriptors specify a time window that is inclusive of the time period to be described linguistically.

11. An apparatus comprising at least one processor and

at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to:

identify a time period to be described linguistically in an output text and one or more linguistic resources for the output text; and

generate a linguistic description of the time period based on a descriptor that is defined by a temporal reference frame of one or more temporal reference frames, the one or more temporal reference frames applicable to the time period and a domain defined by the one or more linguistic resources, the temporal reference frame enabling a greater variation in descriptors for generating the linguistic description than had the descriptor not been defined by the temporal reference frame.

12. An apparatus according to claim 11 , wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to:

determine the one or more temporal reference frames;

align the one or more temporal reference frames to the one or more linguistic resources; and

select the descriptor defined by the temporal reference frame of the one or more temporal reference frames based on the time period and one or more previously generated linguistic descriptions.

13. An apparatus according to claim 11 , wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to:

determine a temporal relationship between the time period and the descriptor, wherein the linguistic description is further based on the temporal relationship between the time period and the descriptor, wherein the descriptor specifies a time window that is inclusive of at least a portion of the time period to be described.

14. An apparatus according to claim 13 , wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to:

verify the linguistic description using one or more constraints.

15. An apparatus according to claim 11 , wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to:

identify another time period to be described linguistically; and

determine a descriptor that is defined by another temporal reference frame of the one or more temporal reference frames.

16. An apparatus according to claim 15 , wherein the descriptor for the another time period is different from the descriptor used for the time period.

17. An apparatus according to claim 11 , wherein each temporal reference frame of the one or more temporal reference frames are partitioned, such that a descriptor is configured to linguistically describe each partition.

18. An apparatus according to claim 17 , wherein the one or more linguistic resources is defined by at least one of a domain model, a current time or a current location.

19. An apparatus according to claim 11 , wherein the time period comprises at least one of a time point or a series of time points.

20. An apparatus of claim 11 , wherein the at least one memory including the computer program code is further configured to, with the at least one processor, cause the apparatus to:

determine that a single descriptor does not specify a time window that is inclusive of the time period to be described linguistically; and

determine two or more descriptors that are defined by a temporal reference frame of the one or more temporal reference frames, wherein the two or more descriptors specify a time window that is inclusive of the time period to be described linguistically.

21. A computer program product comprising at least one computer readable non-transitory memory medium having program code instructions stored thereon, the program code instructions which when executed by an apparatus cause the apparatus at least to:

identify a time period to be described linguistically in an output text and one or more linguistic resources for the output text; and

generate a linguistic description of the time period based on a descriptor that is defined by a temporal reference frame of one or more temporal reference frames, the one or more temporal reference frames applicable to the time period and a domain defined by the one or more linguistic resources, the temporal reference frame enabling a greater variation in descriptors for generating the linguistic description than had the descriptor not been defined by the temporal reference frame.