1. XQuery NoveltiesGeert JostenHardcore XML trackXML Holland 11 november 2010

2. Agenda Original Scope Extending Scope Newest Extensions Beyond Scope Summary11 november 2010Hardcore XML - XQuery 2 3. about XQueryXQuery is replacing proprietary middlewarelanguages and Web Applicationdevelopment languages.11 november 2010 Hardcore XML - XQuery 3 4. About XQueryXQuery is replacing proprietary middlewarelanguages and Web Applicationdevelopment languages. Observation, glue More and more XQuery applications Beyond original scope11 november 2010 Hardcore XML - XQuery 4 5. Original scope11 november 2010Hardcore XML - XQuery 5 6. Origin 1999, XPath and XSLT not enough Query languages applied to XML SQL, OQL, Lorel, .. XML-QL, XQLXQuery Merged into Quilt XQuery WD in 2001 XQuery XQueryXQuery11 november 2010 Hardcore XML - XQuery 6 7. Origin11 november 2010 Hardcore XML - XQuery 7 8. Extending scope11 november 2010 Hardcore XML - XQuery 8 9. Database features Efficient storage and extraction XQuery 1.0 Searching Transactional updating Data integrity, Triggers Simultaneous access Security, Crash-recovery Optionally: Versioning ...11 november 2010Hardcore XML - XQuery 9 10. XQuery and XPath Full Text 1.0 First extension, 2004 W3C Candidate Recommendation Search within specific nodes Advanced contains expressions Options stemming, wildcards, thesaurus, ... Relevance ranking Lot of implementations, few compliant11 november 2010Hardcore XML - XQuery 10 11. XQuery Update Facility 1.0 Introduced in 2006 W3C Candidate Recommendation Updating of individual nodes: insert, delete, replace, rename, and transform No return values! Various implementations, partly compliant11 november 2010 Hardcore XML - XQuery 11 12. Newest extensions11 november 2010Hardcore XML - XQuery 12 13. XQuery Data Definition Facility Presented at XML Prague 2010 28msec and ETH Zrich Static declaration: collections, indexes and constraints Functions: Updating collections Probing indexes One implementation? Zorba / Sausalito11 november 2010 Hardcore XML - XQuery 13 14. Update compositions Presented at XML Prague 2010 ETH Zrich and Oracle Storage cheap Keep all changes Consolidated changes aka composition Versions integral part of tree No implementations?11 november 2010 Hardcore XML - XQuery 14 15. Beyond scope11 november 2010Hardcore XML - XQuery 15 16. XQuery Scripting Extension 1.0 (SX) W3C Working Draft since 2008 Procedural constructs While, variable assignment, exit, .. Breaks functional approach Also allows multiple, incremental updates Update *and* return results Very useful for application logic Few implementations yet11 november 2010 Hardcore XML - XQuery 16 17. XQuery 1.1 W3C Working Draft since 2008 Lots of small improvements Improved FLWOR Try/Catch Dynamic function invocation Output declarations Mature language, design patterns Not many implementations yet11 november 2010 Hardcore XML - XQuery 17 18. XRX and NoSQL NoSQL: Use non-relational database Open source or open standard (like XQuery) XRX: Xforms + Rest + Xquery Innovative two-tier architecture XForms front-end, XQuery back-end,REST api Breaking long-lasting traditions11 november 2010Hardcore XML - XQuery18 19. Summary11 november 2010Hardcore XML - XQuery 19 20. Database features revisited Features covered: Extraction, Searching, Updating, Data constraints,Versioning Functional in nature Uncovered: Storage, Security, Triggers, Crash-recovery.. Mostly technical, necessary? More lacking?11 november 2010 Hardcore XML - XQuery 20 21. Just rememberXQuery is not just for querying XML!11 november 2010Hardcore XML - XQuery 21 22. Questions?11 november 2010 Hardcore XML - XQuery 22 23. Timeline11 november 2010 Hardcore XML - XQuery 23 24. XQuery and XPath Full Text 1.0Contains expressionfor $b in /books/book Combined searchwhere $b/title contains text "improving ftand "usability ordered distance at most 2 words at startreturn Advanced search criterium $b11 november 2010 Hardcore XML - XQuery24 25. XQuery Data Definition Facilitydeclare collection users as element()*;declare automatically maintained index users-by-idon nodes xqddf:collection( xs:QName(users") )by @id as xs:string;xqddf:insert-nodes(xs:QName(users"), );xqddf:probe-index-point(xs:QName(users-by-id"), geert );11 november 2010 Hardcore XML - XQuery 25