An Introduction to XML Query Processing and Keyword Search by Jiaheng Lu

By Jiaheng Lu

"An advent to XML question Processing and key-phrase seek" systematically and comprehensively covers the newest advances in XML info looking out. It provides an in depth evaluate of the present question processing and key-phrase seek innovations on XML facts, together with XML labeling schemes, indexing, processing on order and un-order XML tree styles, XML question optimization, effects estimation, and XML key-phrase searches, that are elaborated in separate chapters. Graduate scholars and researchers within the box of XML information looking will locate this ebook a useful source. Prof. Jiaheng Lu is an affiliate professor at Renmin collage of China’s university of Information.

Show description

Read or Download An Introduction to XML Query Processing and Keyword Search PDF

Best web-design books

Flash XML applications: use AS2 and AS3 to create photo galleries, menus, and databases

. .. maintaining with the most recent top practices in Flash and database layout is a tough strategy. Joachim Schnier brings those practices jointly in a concise, and simple to stick with demeanour in Flash XMLApplications. vital within the internet 2. zero period. - Erik V. Pohovich, grasp internet Developer, New net TechnologiesUsing XML to engage with a database is a must have ability for an individual that wishes to carry dynamic content material .

Creating Your First Web Page (Cliffs Notes)

The pc neophyte could make an online web page in under an hour with this transparent, easy-to-follow advisor. study the fundamentals of HTML, commence charting your site, and use this booklet to get into our on-line world -- the straightforward manner! No event helpful.

HTML & XHTML: The Definitive Guide, 6th edition

". .. lucid, in-depth descriptions of the habit of each HTML tag on each significant browser and platform, plus adequate dry humor to make the booklet a excitement to learn. "--Edward Mendelson, computing device Magazine"When they are saying 'definitive' they are not kidding. "--Linda Roeder, approximately. comPut everthing you want to find out about HTML & XHTML at your fingertips.

XML and FrameMaker

 * This booklet appeals to a pro viewers: Writers, database directors, builders, and creation employees, all of that have to seize or emit XML from latest records or databases. * Describes the relationship among XML and publishing; Explains tips on how to use XML to create records which may be released to many different codecs.

Extra resources for An Introduction to XML Query Processing and Keyword Search

Example text

Restaurant) x1 P x2 Name x3 F x4 . Restaurant) x1 (" j ) x2 Name x3 Fridays x4 40 3 XML Data Indexing Given a path template t, our goal is to construct an index structure that will enable an efficient evaluation of queries in inst(t). The templates are used to guide the indexing mechanism to concentrate on the more interesting parts of the data graph. For example, if we know that the database contains a restaurants directory and that most common queries refer to the restaurant and its name, we may use a path template such as the one above.

That is, Ld (l) is the set of all label paths in d that share the same target set as l. If, for all label paths l of s, Ls (l) D Ld (l), then d is a strong DataGuides for s. 1 Suppose d is a strong DataGuides for a source s. If an annotation p of some label path l is stored on the object o reachable via l in d, then p describes the target set in s of each label path that reaches o. Proof Suppose otherwise. Then there exists some label path m that reaches o, such that p incorrectly describes the target set of m in s.

This also results in inefficient query evaluation, since we have to intersect W(P) with each regular language. 2 Indexes on XML Tree Structure 41 Fig. 3 Refinements To tackle the construction cost, we consider refinements. An equivalence relation is called a refinement if: v u)vÁu We discuss here two choices for refinements: bisimulation b and simulation Both are discussed extensively in the literature [HHK95, Mil89, PT87]. The idea that these can be used to approximate the language equivalence dates back to the modeling of reactive systems and process algebras [HHK95].

Download PDF sample

Rated 4.71 of 5 – based on 11 votes