A temporal-probabilistic database model for information extraction
نویسندگان
چکیده
منابع مشابه
A Temporal-Probabilistic Database Model for Information Extraction
Temporal annotations of facts are a key component both for building a high-accuracy knowledge base and for answering queries over the resulting temporal knowledge base with high precision and recall. In this paper, we present a temporalprobabilistic database model for cleaning uncertain temporal facts obtained from information extraction methods. Specifically, we consider a combination of tempo...
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Full-text documents represent a large fraction of the world’s data. Although not structured per se, they often contain snippets of structured information within them: e.g., names, addresses, and document titles. Information Extraction (IE) techniques identify such structured information in text. In recent years, database research has pursued IE on two fronts: declarative languages and systems f...
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The database model presented in this paper is suitable for application in which queries may require non-crisp references to certain attributes. The data item (attribute) values may be crisp or fuzzy. For instance, such adjectives as 'high' or 'normal' may be attribute values for the attribute blood pressure. A disease or a condition can be described by a number of symptoms which may be crisp al...
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Unsupervised Information Extraction (UIE) is the task of extracting knowledge from text without using hand-tagged training examples. A fundamental problem for both UIE and supervised IE is assessing the probability that extracted information is correct. In massive corpora such as the Web, the same extraction is found repeatedly in different documents. How does this redundancy impact the probabi...
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This paper outlines work-in-progress regarding temporal information extraction, and highlights issues to be discussed by future research in temporal question answering. Based on Schilder & Habel (2001), we first present a semantic tagging system for temporal expressions and discuss how the temporal information conveyed by these expressions can be extracted. We then discuss extensions to the tem...
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ژورنال
عنوان ژورنال: Proceedings of the VLDB Endowment
سال: 2013
ISSN: 2150-8097
DOI: 10.14778/2556549.2556564