The net is inflicting a revolution in how we signify, retrieve, and procedure details Its development has given us a universally obtainable database―but within the kind of a mostly unorganized number of files. this is often altering, because of the simultaneous emergence of latest methods of representing facts: from in the internet group, XML; and from in the database group, semistructured information. The convergence of those techniques has rendered them approximately exact. Now, there's a concerted attempt to advance potent strategies for retrieving and processing either varieties of data.
Data at the Web
is the single entire, up to date exam of those swiftly evolving retrieval and processing thoughts, that are of severe value for the majority net- and data-intensive firms. This booklet deals certain ideas to a variety of useful difficulties whereas equipping you with a prepared knowing of the basic issues―including info types, question languages, and schemas―involved of their layout, implementation, and optimization. you will find it to be compelling studying, no matter if your curiosity is that of a practitioner eager about a database-driven internet company or a researcher in desktop technological know-how or comparable box.
* offers an in-depth examine XML and different applied sciences for publishing dependent records at the Web.
* Examines lately built tools for querying and updating based internet records and semistructured information, together with XML-QL and XSL.
* appears deeper into the convergence of net and database methods to semistructured facts presentation and querying.
* information functional examples of the way those concepts are already being applied―and how they are going to be utilized in the close to future.
* Teaches sound strategies for writing queries over internet facts, describing unfastened schemas over partly established info, and enforcing and optimizing queries on semistructured data.
Read or Download Data on the Web: From Relations to Semistructured Data and XML (The Morgan Kaufmann Series in Data Management Systems) PDF
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Additional info for Data on the Web: From Relations to Semistructured Data and XML (The Morgan Kaufmann Series in Data Management Systems)
1 four. 2 fifty five fifty eight fifty nine sixty two sixty four sixty four sixty six sixty eight sixty eight seventy one four. three four. four four. five four. 6 four. 7 five .......................... 32 33 33 34 36 37 38 38 39 39 forty-one forty four forty four forty five forty six forty seven forty seven forty eight forty nine 50 course Expressions .......... ......................... A middle Language .......... ......................... four. 2. 1 the fundamental Syntax ....... ...................... extra on Lorel ......... ........................... four. three. 1 much less crucial Syntactic Sugaring ..... .............. UnQL .......... ............................... Label and course Variables ....... ...................... four. five. 1 Paths as information ......... ....................... blending with based information ....... .................... Bibliographic comments ......... ...................... question Languages for XML ....... five. 1 ....................... XML-QL ........... ............................. five. 1. 1 developing New XML info ..... ............... five. 1. 2 Processing not obligatory components with Nested Queries ...... five. 1. three Grouping with Nested Queries ..... ............... five. 1. four Binding parts and Contents ..... .............. seventy three seventy three seventy four seventy six seventy seven seventy eight Contents five. 2 five. three 6 five. 1. five Querying Attributes ....... .................... five. 1. 6 becoming a member of components by means of price ..... ................. five. 1. 7 Tag Variables ......... ....................... five. 1. eight common course Expressions ...... .................. five. 1. nine Order ......... ........................... XSL .... ................................ Bibliographic feedback ......... ...................... Interpretation and complex positive aspects ..... 6. 1 6. 2 6. three 6. four 6. five 6. 6 .......................... Typing Semistructured information ...... 7. 1 7. 2 7. three 7. four 7. five 7. 6 ................. First-Order Interpretation ....... ..................... item production ........ .......................... Graphical Languages ......... ...................... Structural Recursion ......... ...................... 6. four. 1 Structural Recursion on timber ...... .............. 6. four. 2 XSL and Structural Recursion ...... .............. 6. four. three Bisimulation in Semistructured facts ............... 6. four. four Structural Recursion on Cyclic information .... ........... StruQL ........... ............................. Bibliographic comments ......... ..................... ailing forms ........ 7 ix ..................... seventy eight seventy nine seventy nine eighty eighty one eighty three 89 ninety one ninety two ninety six a hundred a hundred and one one zero one 104 106 111 one hundred fifteen 117 119 121 what's Typing stable For? ....... .................... 7. 1. 1 shopping and Querying info .................... 7. 1. 2 Optimizing question overview ...... .............. 7. 1. three enhancing garage ...... .................... interpreting the matter ......... ..................... Schema Formalisms ........ ....................... 7. three. 1 common sense .......... .......................... 7. three. 2 Datalog ......... ......................... 7. three. three Simulation ......... ....................... 123 123 124 one hundred twenty five 126 127 127 129 132 7. three. four 139 comparability among Datalog ideas and Simulation . ... Extracting Schemas from info ....... .................. 7. four. 1 facts courses ........ ....................... 7. four. 2 Extracting Datalog ideas from facts ..... ........... Inferring Schemas from Queries ...... ................. Sharing, Multiplicity, and Order ......