<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Leon,<div><br></div><div><br></div><div>I think I'm not directly answering your question (asking related literature), but I just want to give a comment. If you are building an application which needs to recognize abstract codes, don't be afraid to make such category. We don't have to start designing it from the definition of "named entity". Rather, we should start design it from what is important for your application. We may be able to call them "targets of interest" or "important designator".</div><div><br></div><div>Actually, when we designed 200 extended named entity, which includes color name, animal, ID number (like yours), job title etc, we got comments that these are not named entities. We spent sometime trying to coin a new term to describe it, but it was not successful. (if any of you come up with a good name, please let me know).</div><div><br></div><div><a href="http://nlp.cs.nyu.edu/ene/version7_1_0Beng.html">http://nlp.cs.nyu.edu/ene/version7_1_0Beng.html</a></div><div><a href="http://cs.nyu.edu/~sekine/papers/lrec04-65.pdf">http://cs.nyu.edu/~sekine/papers/lrec04-65.pdf</a></div><div><br></div><div>Thanks,</div><div>Satoshi Sekine</div><div><br></div><div><br></div><div> <br><div><div>On 2014/11/03, at 7:24, Leon Derczynski wrote:</div><blockquote type="cite"><div dir="ltr">Dear list,<div><br></div><div>Are "abstract codes" named entities? For example, "The *15:07 train to Sheffield*", "*Flight MH17*", "The new *Canon 50D*", "pass me *document 123*"?<br></div><div><br></div><div>One generic definition of a named entity is, a phrase that is a rigid designator. When we talk about "Lars von Trier", it is fairly uncontroversial to claim that this fits the rigid designator definition well. But using a less descriptive, more abstract phrase, like a document identifier, does the definition fit just as well? Is there some related literature?<br></div><div><br></div><div>All the best,</div><div><br></div><div><br></div><div>Leon</div><div><div><br></div>-- <br><div><div dir="ltr">Leon R A Derczynski<br>Research Associate, NLP Group<div><br></div><div>Department of Computer Science</div><div>University of Sheffield, UK</div><div><br><div>Voted number one for student experience</div><div>Times Higher Education Student Experience Survey <a href="tel:2014-2015" value="+4520142015" target="_blank">2014-2015</a></div><br><a href="http://www.dcs.shef.ac.uk/~leon/" target="_blank">http://www.dcs.shef.ac.uk/~leon/</a></div></div></div>
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<div>------------------------------</div><div>Satoshi Sekine</div><div><a href="mailto:sekine@cs.nyu.edu">sekine@cs.nyu.edu</a></div><div><br></div><br class="Apple-interchange-newline">
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