Structural queries - PowerPoint PPT Presentation

Chapter 4 Query Language

Chapter 4 Query Language. Hsin-Hsi Chen Department of Computer Science and Information Engineering National Taiwan University. Introduction. Goals Which queries can be formulated How the formulation is related to underlying information retrieval models Query languages. Boolean queries

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Query Languages: Patterns &amp; Structures

Query Languages: Patterns &amp; Structures. Pattern Matching. Pattern a set of syntactic features that must occur in a text segment Types of patterns Words: string (sequence of characters) in the text Prefixes: string forming the beginning of a text word (e.g., comput → computer, computation)

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229 views • 9 slides

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Structural queries - PowerPoint PPT Presentation

Chapter 4 Query Language

Query Languages: Patterns &amp;amp; Structures

Query Languages: Patterns & Structures