NDLI: Efficient processing of partially specified twig pattern queries

Content Provider	Springer Nature Link
Author	Zhou, JunFeng Meng, XiaoFeng Ling, TokWang
Copyright Year	2009
Abstract	As huge volumes of data are organized or exported in tree-structured form, it is quite necessary to extract useful information from these data collections using effective and efficient query processing methods. A natural way of retrieving desired information from XML documents is using twig pattern (TP), which is, actually, the core component of existing XML query languages. Twig pattern possesses the inherent feature that query nodes on the same path have concrete precedence relationships. It is this feature that makes it infeasible in many actual scenarios. This has driven the requirement of relaxing the complete specification of a twig pattern to express more flexible semantic constraints in a single query expression. In this paper, we focus on query evaluation of partially specified twig pattern (PSTP) queries, through which we can reap the most flexibility of specifying partial semantic constraints in a query expression. We propose an extension to XPath through introducing two Samepath axes to support partial semantic constraints in a concise but effective way. Then we propose a stack based algorithm, pTwigStack, to process a PSTP holistically without deriving the concrete twig patterns and then processing them one by one. Further, we propose two DTD schema based optimization methods to improve the performance of pTwigStack algorithm. Our experimental results on various datasets indicate that our method performs significantly better than existing ones when processing PSTPs.
Starting Page	1830
Ending Page	1847
Page Count	18
File Format	PDF
ISSN	10092757
Journal	Science in China Series : Information Sciences
Volume Number	52
Issue Number	10
e-ISSN	18622836
Language	English
Publisher	SP Science in China Press
Publisher Date	2009-10-06
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	XML database query processing partially specified twig pattern holistic twig join XPath Information Systems and Communication Service
Content Type	Text
Resource Type	Article
Subject	Computer Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Efficient Processing of Multiple XML Twig Queries

Efficient processing of ordered XML twig pattern (2005)

Holistically processing XML twig queries with AND, OR, and NOT predicates

TwigStackList¬: A Holistic Twig Join Algorithm for Twig Query with Not-predicates on XML Data (2006)

Twigstacklistnot: A holistic twig join algorithm for twig query with not-predicates on XML data (2006)

Holistic Boolean-Twig Pattern Matching for Efficient XML Query Processing

TJFast: Effective Processing of XML Twig Pattern Matching (2005)

Efficient processing of partially specified twig queries.

Efficient Holistic Twig Join Algorithm on XML Documents with Optimization Rules and Index

Efficient processing of partially specified twig pattern queries

Similar Documents

Efficient Processing of Multiple XML Twig Queries

Efficient processing of ordered XML twig pattern (2005)

Holistically processing XML twig queries with AND, OR, and NOT predicates

TwigStackList¬: A Holistic Twig Join Algorithm for Twig Query with Not-predicates on XML Data (2006)

Twigstacklistnot: A holistic twig join algorithm for twig query with not-predicates on XML data (2006)

Holistic Boolean-Twig Pattern Matching for Efficient XML Query Processing

TJFast: Effective Processing of XML Twig Pattern Matching (2005)

Efficient processing of partially specified twig queries.

Efficient Holistic Twig Join Algorithm on XML Documents with Optimization Rules and Index

Efficient processing of partially specified twig pattern queries