TimeML

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TimeML is a set of rules for encoding documents electronically. It is defined in the TimeML Specification version 1.2.1^[1] developed by several efforts, led in large part by the Laboratory for Linguistics and Computation at Brandeis University.

The TimeML project's goal is to create a standard markup language for temporal events in a document. TimeML addresses four problems regarding event markup, including time stamping (with which an event is anchored to a time), ordering events with respect to one another, reasoning with contextually underspecified temporal expressions, and reasoning about the length of events and their outcomes.^[2]