lecture9 - Semi-structured or Web-like Databases CS30785...

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Semi-structured or Web-like Databases CS30785 Lecture 9 – Path Expression Dr. Gangmin Gary Li Department of CSSE XJTLU Gangmin.li@xjtlu.edu.cn Room: D441
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Outlines New syntax of path expression – “.” expression on path – “where” clause to specify a condition – Predicates – regular expressions – “()” the nesting sub-queries L9 - Path Expression CS30785 - Semistructured or Web-like databases 9-2
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SSDB or WDB Query Query in Set theory (braces expression) L9 - Path Expression CS30785 - Semistructured or Web-like databases 9-3
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SSDB or WDB Query – Path expression Query in graph or XML (path expression) L9 - Path Expression CS30785 - Semistructured or Web-like databases 9-4
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SSDB or WDB Query – Path expression Query in graph or XML (path expression) L9 - Path Expression CS30785 - Semistructured or Web-like databases 9-5
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SSDB or WDB Query – Path expression In general, the result of the path expression l 1 .l 2 .l n on a data graph is the set of nodes v n Such that there exist
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This note was uploaded on 05/22/2011 for the course CS 30785 taught by Professor Garyli during the Spring '11 term at University of Liverpool.

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lecture9 - Semi-structured or Web-like Databases CS30785...

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