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Active XQuery

A. Bonifati, D. Braga, A. Campi, S. Ceri
Proceedings 18th International Conference on Data Engineering  
OLDNODE(S) Semantics Semantics of of Active XQuery Active XQuery Execution Model for Active XQuery -Semantics close to SQL3 (1) For each update, compute the set of affected nodes (2) Each update is  ...  if it is an "EvalBefore" instruction -Call COMPUTE_AFTER_CS if it is an "EvalAfter" instruction -Execute it if it is an update statement Active Active XQuery XQuery Architecture Architecture  ... 
doi:10.1109/icde.2002.994754 dblp:conf/icde/BonifatiBCC02 fatcat:d3y43e4idndgxmyhdjdkowdqta

Semantic Based Access over XML Data [chapter]

Nikos Bikakis, Nektarios Gioldasis, Chrisa Tsinaraki, Stavros Christodoulakis
2009 Lecture Notes in Computer Science  
In this paper we describe the SPARQL2XQuery framework, which translates the SPARQL queries to semantically equivalent XQuery queries for accessing XML databases from the Semantic Web environment.  ...  This activity translates the BGPs to semantically equivalent XQuery expressions based on the BGP2XQuery algorithm.  ...  The UF-GP Processing activity is a composite one, with various sub-activities.  ... 
doi:10.1007/978-3-642-04754-1_27 fatcat:wwu2ahis4jhzjiqcl32ic4avju

MonetDB/XQuery

Peter Boncz, Torsten Grust, Maurice van Keulen, Stefan Manegold, Jan Rittinger, Jens Teubner
2006 Proceedings of the 2006 ACM SIGMOD international conference on Management of data - SIGMOD '06  
We also formulate relational XQuery join evaluation strategies that exploit the existential semantics of general comparisons in XQuery (in contrast to plain relational joins). Outline.  ...  Section 2 introduces the basic concepts of relational XML storage and the XQuery compilation scheme we use.  ...  (ii) Partitioning: while in plain staircase join only a single context node could be active, in the loop-lifted version each context node may be active for a set of iterations, and stays active for that  ... 
doi:10.1145/1142473.1142527 dblp:conf/sigmod/BonczGKMRT06 fatcat:ebu7v3o5m5f3jkynowhlsh6sf4

XQOWL: An Extension of XQuery for OWL Querying and Reasoning

Jesús M. Almendros-Jiménez
2015 Electronic Proceedings in Theoretical Computer Science  
XQOWL can be considered as an extension of the XQuery language that connects XQuery with SPARQL and OWL reasoners.  ...  XQOWL embeds SPARQL queries (via Jena SPARQL engine) in XQuery and enables to make calls to OWL reasoners (HermiT, Pellet and FaCT++) from XQuery.  ...  For instance, the individual message1 is an activity, because message is a subclass of activity, and the individual event1 is also an activity because event is a subclass of activity.  ... 
doi:10.4204/eptcs.173.4 fatcat:x72oyklv55cuxblcwqzw452wwi

Efficient XSLT Processing in Relational Database System

Zhen Hua Liu, Anguel Novoselsky
2006 Very Large Data Bases Conference  
Consequently, we can leverage all the work done for efficient XQuery/XPath processing in database to achieve combined optimisations of XSLT with XQuery/XPath and SQL/XML in Oracle XMLDB.  ...  Efficient processing of XQuery, XPath and SQL/XML on XML documents stored and managed in RDBMS has been widely studied.  ...  The main difference is however, that XSLT templates are activated as a result of dynamic pattern matching while XQuery functions are invoked explicitly.  ... 
dblp:conf/vldb/LiuN06 fatcat:3naxlq2nevabna3gvz3chcilam

XQuery for Digital Humanists

Joseph Wicentowski, Clifford Anderson
2017 Digital Humanities Conference  
He also actively participates in TEI, XQuery, and digital humanities communities, and fosters discussion about XQuery on Twitter at @XQuery.  ...  Introduction: XQuery for the Digital Humanities II. Setting up an XQuery environment III. Finding data with XPath IV. Writing FLWOR expressions V.  ... 
dblp:conf/dihu/WicentowskiA17 fatcat:7wog242ugbae3mws2qzqrhceme

The GCX System: Dynamic Buffer Minimization in Streaming XQuery Evaluation

Christoph Koch, Stefanie Scherzinger, Michael Schmidt
2007 Very Large Data Bases Conference  
In this demo, we show the various stages in evaluating a practical fragment of XQuery with GCX.  ...  In this demonstration, we present the main-memory based streaming XQuery engine GCX which implements novel buffer management strategies that combine static and dynamic analysis to keep main memory consumption  ...  THE GCX XQUERY ENGINE We have implemented active garbage collection for a prototype XQuery engine, called GCX.  ... 
dblp:conf/vldb/KochSS07 fatcat:b2clbfmrsbfdpm55vtu7lw4lcy

XQuery for Data Integration

Joseph Wicentowski, Clifford Anderson
2017 Digital Humanities Conference  
He also actively participates in TEI, XQuery, and digital humanities communities, and fosters discussion about XQuery on Twitter at @XQuery.  ...  Querying JSON with XQuery IV. Querying RDF with XQuery V. Enriching TEI with data from other sources and formats Each section will include hands-on exercises.  ... 
dblp:conf/dihu/WicentowskiA17a fatcat:6vigpfutwjbvnkfp3ryjs2heoy

ActiveXQBE: A Visual Paradigm for Triggers over XML Data [chapter]

Daniele Braga, Alessandro Campi, Davide Martinenghi, Alessandro Raffio
2006 Lecture Notes in Computer Science  
In the past years, several languages have been proposed for updates as well as for triggers in XML, such as XUpdate and Active XQuery.  ...  While XQuery is becoming a standard, the W3C is currently discussing the features of an update language for XML, and its requirements.  ...  Figure 7 shows the trigger of figure 5 (b) and its translation into Active XQuery.  ... 
doi:10.1007/11896548_65 fatcat:ak6ilji3n5eljb4tvuouegtuo4

Querying XML Data with SPARQL [chapter]

Nikos Bikakis, Nektarios Gioldasis, Chrisa Tsinaraki, Stavros Christodoulakis
2009 Lecture Notes in Computer Science  
The mappings are used to automatically translate SPARQL queries to semantically equivalent XQuery queries which are used to access the XML databases.  ...  The UF-GP processing translates the constituent UF-GPs into semantically equivalent XQuery expressions. The UF-GP Processing activity is a composite one, with various sub-activities.  ...  These bindings are going to be used in the next steps as input to the Variable Bindings activity. -UF-GP2XQuery. This activity translates the UF-GP into semantically equivalent XQuery expressions.  ... 
doi:10.1007/978-3-642-03573-9_32 fatcat:6dxgtqhtbvba5jyscai7echpaq

Distributed continuous queries over Web service event streams

Waldemar Hummer, Benjamin Satzger, Philipp Leitner, Christian Inzinger, Schahram Dustdar
2011 2011 7th International Conference on Next Generation Web Services Practices  
An XQuery language extension lets users easily express such dependencies, which are then continuously resolved with the required data at runtime.  ...  The active query model utilizes XQuery window clauses, and provides a language extension to model data dependencies between event streams or other query inputs.  ...  Note that XQuery provides these features for queries over event streams, but has no explicit means for active continuous queries that consider data dependencies between streams, automatically request and  ... 
doi:10.1109/nwesp.2011.6088173 fatcat:kajupqkqbrcgpbinwpgdukvuf4

Extending XQuery with Window Functions

Irina Botan, Peter M. Fischer, Daniela Florescu, Donald Kossmann, Tim Kraska, Rokas Tamosevicius
2007 Very Large Data Bases Conference  
This paper presents two extensions for XQuery.  ...  The second extension extends the XQuery data model (XDM) to support infinite sequences. This extension makes it possible to use XQuery as a language for continuous queries.  ...  An active item is an item that is involved in at least one open window. Correspondingly, consumed items are items that are not part of any active window.  ... 
dblp:conf/vldb/BotanFFKKT07 fatcat:enktas53rfbgvp5nfpokg2b5xy

A question answering system for project management applications

Jinxing Cheng, Bimal Kumar, Kincho H Law
2002 Advanced Engineering Informatics  
question answering system has been built and tested to illustrate the potential usefulness of such a system for project management applications. end date, duration, successors, and predecessors of an activity  ...  XQuery uses a syntax similar to SQL.  ...  The program first analyzes questions and converts them into XQuery expressions. The XQuery engine then executes the XQuery expressions based on the current knowledge base.  ... 
doi:10.1016/s1474-0346(03)00014-4 fatcat:ci7hr6o7rnagpdoxsojp3vbis4

A Design of Spatial XQuery for Mobile and Location-Based Applications [chapter]

Soon-Young Park, Jae-Dong Lee, Hae-Young Bae
2005 Lecture Notes in Computer Science  
Translation of the Spatial XQuery into SQL has been explained using examples.  ...  And in order to handle effectively the extension, a Spatial XQuery language and its processing modules has been designed.  ...  Geography Markup Language (GML) [9] is the active standard for exchanging spatial data on the Internet and mobile devices, but it is limited only for text and graphic data of static geographic information  ... 
doi:10.1007/11531371_21 fatcat:b2swusbgovdl3ihsrbzknj3eke

XQuery reloaded

Roger Bamford, Sorin Nasoi, Markos Zacharioudakis, Vinayak Borkar, Matthias Brantner, Peter M. Fischer, Daniela Florescu, David Graf, Donald Kossmann, Tim Kraska, Dan Muresan
2009 Proceedings of the VLDB Endowment  
Among others, this paper presents an XQuery Benchmark Service which helps practitioners and XQuery processor vendors to find performance problems in an XQuery processor.  ...  This paper describes a number of XQuery-related projects. Its goal is to show that XQuery is a useful tool for many different application scenarios.  ...  These activities include the implementation of two open source XQuery engines, Zorba [27] and MXQuery [53] . The remainder of this paper is organized as follows.  ... 
doi:10.14778/1687553.1687560 fatcat:rqw4yu3gjjagtdcdsfhrn7n2pm
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