Natural Language Processing for Online Applications: Text Retrieval, Extraction, and CategorizationThis text covers the emerging technologies of document retrieval, information extraction, and text categorization in a way which highlights commonalities in terms of both general principles and practical issues. It seeks to satisfy a need on the part of technology practitioners in the Internet space, faced with having to make difficult decisions as to what research has been done an what the best practices are. It is not intended as a vendor guide (such things are quickly out of date), or as a recipe for building applications (such recipes are very context-dependent). But it does identify the key technologies, the issues involved, and the strengths and weaknesses on evaluation in every chapter, both in terms of methodology (how to evaluate) and what controlled experimentation and industrial experience have to tell us. |
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Page 119
... assigned one or more categories by human editors , so we say that the classification was performed ' manually . On ... assignment of documents to classes , not necessarily based on content , e.g. , sorting by author , by publisher , or ...
... assigned one or more categories by human editors , so we say that the classification was performed ' manually . On ... assignment of documents to classes , not necessarily based on content , e.g. , sorting by author , by publisher , or ...
Page 129
... assigning each such document to a single category for some time . Thus , for each category , you have a reasonable number1 of past documents already assigned . Bayes ' Rule One approach to automating ( or semi - automating ) this ...
... assigning each such document to a single category for some time . Thus , for each category , you have a reasonable number1 of past documents already assigned . Bayes ' Rule One approach to automating ( or semi - automating ) this ...
Page 184
... assigned to the previous word in the sentence . ( We assume that sentence boundaries have al- ready been determined . ) Another is the preceding word itself . Thus one com- ponent of assigning a name class , NC , to the current word ...
... assigned to the previous word in the sentence . ( We assume that sentence boundaries have al- ready been determined . ) Another is the preceding word itself . Thus one com- ponent of assigning a name class , NC , to the current word ...
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Common terms and phrases
algorithm analysis anaphora applications approach assigned automatic Boolean Chapter classifiers cluster collection combination computed Conference contain context corefer coreference court decision tree docu document retrieval estimate evaluation example FASTUS filtering finite frequency given grammar identify information extraction information retrieval linear classifiers linguistic Machine Learning match measure Message Understanding Conference methods Microsoft Naïve Bayes named entity Natural Language Processing non-relevant NOT-A-NAME noun groups noun phrase occur parser parsing patterns performance probabilistic probability problem Proceedings pronoun proper names query expansion query terms ranked retrieval recall and precision regular expressions relevance feedback relevant documents represent rules score search engine Section semantic sentence Sidebar simple statistical structure summary syntactic Table tagged taggers task techniques template text categorization text classification text mining tf-idf tion topic TREC typically vector space vector space model weight vector words