In this facts harvesting task, some recent approaches focus
on scalability in addition to recall and precision. It is the
case of which take advantage of Hadoop MapReduce to distribute
the patterns matching part of their algorithm. Now
focusing on the velocity, almost the same group of authors
has proposed a novel approach for population of knowledge
bases in . Here, they propose to extract a certain set of
relations from documents in a given “time-slice”. This extraction
can be improved based on the topics covered by the document
(e.g do not try to extract music-domain relations from
a sport document) or by matching patterns of relations on an
index build from documents. More, since web is redundant
(a given fact is published by tens of sites), a small percentage
of documents can cover a significant part of facts. Likewise,
RDF-format unstructured data during a time-slice
duration. It is important to note that the whole processing of
data gather during a period of time must be done during that
period of time, unless the processing cycle will be blocked.
Recall that relations could be n-ary. For instance, in web
representative-corpus, n-ary relations represented 40% of all
relations. About n-ary relations extraction,are very relevant
work. They both use Stanford CoreNLP typed dependencies
paths to extract arguments of different facts. To end with
information extraction, let us precise that is not all about
free text. Some work has thus focus on web tables or lists
In this facts harvesting task, some recent approaches focuson scalability in addition to recall and precision. It is thecase of which take advantage of Hadoop MapReduce to distributethe patterns matching part of their algorithm. Nowfocusing on the velocity, almost the same group of authorshas proposed a novel approach for population of knowledgebases in . Here, they propose to extract a certain set ofrelations from documents in a given “time-slice”. This extractioncan be improved based on the topics covered by the document(e.g do not try to extract music-domain relations froma sport document) or by matching patterns of relations on anindex build from documents. More, since web is redundant(a given fact is published by tens of sites), a small percentageof documents can cover a significant part of facts. Likewise,RDF-format unstructured data during a time-sliceduration. It is important to note that the whole processing ofdata gather during a period of time must be done during thatperiod of time, unless the processing cycle will be blocked.Recall that relations could be n-ary. For instance, in webrepresentative-corpus, n-ary relations represented 40% of allrelations. About n-ary relations extraction,are very relevantwork. They both use Stanford CoreNLP typed dependenciespaths to extract arguments of different facts. To end withinformation extraction, let us precise that is not all aboutfree text. Some work has thus focus on web tables or lists
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