Tag Archives: NLP

The Viterbi Parser

The new Viterbi decoder for Link Grammar should offer better integration with higher level semantic algorithms! Continue reading

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Meaning-Text Theory

During some recent reading, it struck me that a useful framework for thinking about and talking about sentence generation is the MTT or “meaning-text theory” of Igor Mel’cuk, et al Here is one readable reference:

Igor A. Mel’čuk and …

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Semantic dependency relations

I spent the weekend comparing the Stanford parser to RelEx, and learned a lot. RelEx really does deserve to be called a “semantic relation extractor”, and not just a “dependency relation extractor”. It provides a more abstract, …

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Sentence Patterns

I’ve recently resumed work on the question-answering chatbot, and am trying to get it to comprehend a broader range of questions and statements.   The “big idea” is to create a number of “sentence patterns” that the pattern matcher can …

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Frequency of grammatical disjuncts

The link-grammar parser uses labeled links to connect together pairs of words.  In order to capture the idea of proper grammatical construction, any given word is only allowed to have very specific links to its right or left: for …

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proto-chatbot at last!

A prototype chatbot demonstrates the OpenCog NLP pipeline by parsing simple statements and answering simple questions. Continue reading

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Distribution of Mutual Information

A bit of corpus linguistics is performed to examine the mutual information distribution of word pairs. Continue reading

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Determining word senses from grammatical usage

I’ve recently been tinkering with a mechanism for determining word senses based on their grammatical usage.  This has me pretty excited, because, so far, it seems to be reasonably accurate (i.e. not terrible), and lightning-fast.  I’m doing this by …

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Hacking on Link-Grammar

I hack, heads-down, on link-grammar every now and then. Yesterday, I fixed another round of broken parse rules: making sure that sentences like “John is altogether amazingly quick.” “That one is marginally better” “I am done working” “I asked …

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Mapping Wordnet, RelEx to OpenCog

I spent the afternoon creating a formalized mapping from RelEx and Wordnet to OpenCog. The goal is to clean things up enough so that I can run word-sense disambiguation code with opencog itself. Now, one thing that was …

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