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Information Retrieval 1 (Types of Data (Unstructured Data (records do not…
Information Retrieval 1
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Types of Data
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Semi-Structured Data
Eg. first paragraph contains name and age, second paragraph contains DOB and address
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Structured Data
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definite meaning, specific type (relational DB table records)
Retrieval Process
Ad-hoc Retrieval
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static documents, new queries
Filtering
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static queries, new documents
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Full text => Index Terms
Use Stemming - technique used reduce words to their grammatical roots (apples = apple, men = man)
Identification of non-groups - elimination of adjectives, adverbs and verbs (running slowly, very)
Eliminate Stopwords - articles, prepositions and conjunctions (the, a, in, but)
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