Extraction operators - PowerPoint PPT Presentation

RAL: an R DF Al gebra

RAL: an R DF Al gebra. Flavius Frasincar Geert-Jan Houben Richard Vdovjak Peter Barna. Contents. Introduction RAL Goals RAL Data Model RAL Operators Conclusion. 1. Introduction. Metadata is machine understandable information about web resources or other things

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594 views • 38 slides

XAL - An X ML AL gebra for Query Optimization

XAL - An X ML AL gebra for Query Optimization. Flavius Frasincar Geert-Jan Houben Cristian Pau. Databases &amp; Hypermedia Group Division of Computer Science. Contents. Motivation XML Query Algebra Goals XML Query Algebras XAL XAL Optimization Laws

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416 views • 30 slides

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