A Typology of Near-Identity Relations for Coreference (NIDENT)

  • Recasens M
  • Hovy E
  • Martí M
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The task of coreference resolution requires people or systems to decide when two referring expressions refer to the ‘same’ entity or event. In real text, this is often a difficult decision because identity is never adequately defined, leading to contradictory treatment of cases in previous work. This paper introduces the concept of ‘near-identity’, a middle ground category between identity and non-identity, to handle such cases systematically. We present a typology of Near-Identity Relations (NIDENT) that includes fifteen types—grouped under four main families—that capture a wide range of ways in which (near-)coreference relations hold between discourse entities. We validate the theoretical model by annotating a small sample of real data and showing that inter-annotator agreement is high enough for stability (K= 0.58, and up to K= 0.65 and K= 0.84 when leaving out one and two outliers, respectively). This work enables subsequent creation of the first internally consistent language resource of this type through larger annotation efforts.

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  • SCOPUS: 2-s2.0-85037147474
  • PUI: 619603070
  • ISBN: 2-9517408-6-7
  • SGR: 85037147474


  • Marta Recasens

  • Eduard Hovy

  • M. Antònia Martí

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