A method, system and computer device for interacting in a multi-round session are disclosed. The method comprises: receiving user requirement information (101); mapping the user requirement information to standard requirements contained in nodes of a plurality of locally preset requirement structure trees, the standard requirement contained in each node being a general requirement of standard requirements contained in sub-nodes of the node in the requirement structure trees (102); and outputting content of the standard requirements contained in sub-nodes of a selected non-leaf node or session information corresponding to a selected leaf node, if the standard requirement contained in the selected node in the plurality of requirement structure trees matches the user requirement information (103). The above technical solution provides a session interaction method for a task-based session system with a tree-like hierarchical dependency, while improving the matching rate of the user requirement.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. (canceled) 2. (canceled) 3. (canceled) 4. (canceled) 5. (canceled) 6. (canceled) 7. (canceled) 8. (canceled) 9. (canceled) 10. (canceled) 11. (canceled) 12. (canceled) 13. (canceled) 14. (canceled) 15. (canceled) 16. (canceled) 17. (canceled) 18. (canceled) 19. (canceled) 20. (canceled) 21. A method for interacting in a multi-round session, comprising: receiving user requirement information; mapping the user requirement information to standard requirements contained in nodes of a plurality of locally preset requirement structure trees, the standard requirement contained in each node being a general requirement of standard requirements contained in sub-nodes of the node in the requirement structure trees; and outputting content of the standard requirements contained in sub-nodes of a selected non-leaf node or session information corresponding to a selected leaf node, if the standard requirement contained in the selected node in the plurality of requirement structure trees matches the user requirement information. 22. The method according to claim 21, wherein the mapping of the user requirement information to standard requirements contained in nodes of a plurality of locally preset requirement structure trees comprises: determining that the standard requirement contained in a node matches the user requirement information, if the standard requirement contained in the node in the plurality of requirement structure trees is identical with the user requirement information. 23. The method according to claim 21, wherein the plurality of requirement structure trees have no node containing a standard requirement identical with the user requirement information, and the mapping of the user requirement information to standard requirements contained in nodes of a plurality of locally preset requirement structure trees comprises: semantically comparing the user requirement information with the standard requirement contained in each node of the plurality of requirement structure trees, and determining that a most specific standard requirement in the standard requirements semantically matched with the user requirement information matches the user requirement information; or semantically comparing a combination of the user requirement information and a historical user requirement information previously inputted by a user with the standard requirement contained in each node of the plurality of requirement structure trees, and determining that the most specific standard requirement in the standard requirements semantically matched with the user requirement information matches the user requirement information. 24. The method according to claim 21, wherein the outputting of content of the standard requirements contained in sub-nodes of a selected non-leaf node or session information corresponding to a selected leaf node comprises: outputting content of the standard requirements contained in sibling nodes of the selected node. 25. The method according to claim 21, further comprises: establishing the requirement structure trees in different fields by training and learning with a user behavior log and knowledge in various fields. 26. A system for interacting in a multi-round session, comprises: a receiving module for receiving user requirement information; a mapping module for mapping the user requirement information to standard requirements contained in nodes of a plurality of locally preset requirement structure trees, the standard requirement contained in each node being a general requirement of standard requirements contained in sub-nodes of the node in the requirement structure trees; and an outputting module for outputting content of the standard requirements contained in sub-nodes of a selected non-leaf node or session information corresponding to a selected leaf node, if the standard requirement contained in the selected node in the plurality of requirement structure trees matches the user requirement information. 27. The system according to claim 26, wherein the mapping module is used for determining that the standard requirement contained in a node matches the user requirement information, if the standard requirement contained in the node in the plurality of requirement structure trees is identical with the user requirement information. 28. The system according to claim 26, wherein the plurality of requirement structure trees have no node containing a standard requirement identical with the user requirement information, and the mapping module is further used for: semantically comparing the user requirement information with the standard requirement contained in each node of the plurality of requirement structure trees, and determining that a most specific standard requirement in the standard requirements semantically matched with the user requirement information matches the user requirement information; or semantically comparing a combination of the user requirement information and a historical user requirement information previously inputted by a user with the standard requirement contained in each node of the plurality of requirement structure trees, and determining that the most specific standard requirement in the standard requirements semantically matched with the user requirement information matches the user requirement information. 29. The system according to claim 26, wherein the outputting module is further used for outputting content of the standard requirements contained in sibling nodes of the selected node. 30. The system according to claim 26, further comprises: an establishing module for establishing the requirement structure trees in different fields by training and learning with a user behavior log and knowledge in various fields. 31. A computer device comprising: one or more processors; a memory; and one or more programs, the one or more programs being stored in the memory and comprising instructions configured to be executed by the one or more processors to implement a method for interacting in a multi-round session, the method comprising: receiving user requirement information; mapping the user requirement information to standard requirements contained in nodes of a plurality of locally preset requirement structure trees, the standard requirement contained in each node being a general requirement of standard requirements contained in sub-nodes of the node in the requirement structure trees; and outputting content of the standard requirements contained in sub-nodes of a selected non-leaf node or session information corresponding to a selected leaf node, if the standard requirement contained in the selected node in the plurality of requirement structure trees matches the user requirement information.