HeidelTime: High Quality Rule-Based Extraction and Normalization of Temporal Expressions
نویسندگان
چکیده
Different types •Date: On May 22, 1995, Farkas was ... •Time: ... in Brownsville around 7:15 p.m. •Duration: He spent six days abroad ... •Set: ... for liver transplants each year ... Different occurrences in documents • explicit easy to normalize • implicit knowledge is needed • relative reference time is needed (& additional information) Annotation scheme •TimeML: ISO standard for temporal annotation (Timex3) [2] Main Challenges
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