Papers on Object-Relationship-Attribute Model for Semistructured Data (ORA-SS)

Sin Yeung Lee, Mong-Li Lee, Tok Wang Ling, Leonid A. Kalinichenko: Designing Good Semi-Structured Databases and Conceptual Modeling. ER 1999: 131-145
Mengchi Liu, Tok Wang Ling: A Data Model for Semistructured Data with Partial and Inconsistent Information. EDBT 2000: 317-331
Mengchi Liu, Tok Wang Ling: A Conceptual Model for the Web ER 2000: 225-238
Gillian Dobbie, Xiaoying Wu, Tok Wang Ling, Mong Li Lee: ORA-SS: An Object-Relationship-Attribute Model for Semistructured Data TR21/00, Technical Report, Department of Computer Science, National University of Singapore, December 2000.
Mengchi Liu, Tok Wang Ling: A Rule-Based Query Language for HTML. DASFAA 2001: 6-13
Tok Wang Ling, Mong Li Lee, Gillian Dobbie: Applications of ORA-SS: An Object-Relationship-Attribute Model for Semistructured Data (ppt file) 3rd Int Conf on Information Integration and Web-based Applications & Service (IIWAS'2001), pp 17-28, 10-12 Sept 2001, Linz, Austria.
Mong-Li Lee, Sin Yeung Lee, Tok Wang Ling, Gillian Dobbie, Leonid A. Kalinichenko: Designing Semistructured Databases: A Conceptual Approach. DEXA 2001: 12-21
Xiaoying Wu, Tok Wang Ling, Sin Yeung Lee, Mong-Li Lee, Gillian Dobbie: NF-SS: A Normal Form for Semistructured Schema (ppt file) International Workshop on Data Semantics in Web Information Systems. (DASWIS'2001), ER'2001 workshop, November 29-30, 2001 Yokohama, Japan.
Xiaoying Wu, Tok Wang Ling, Mong-Li Lee, Gillian Dobbie: Designing Semistructured Databases Using ORA-SS Model. (ppt file) WISE (1) 2001: 171-180, 3-6 December 2001, Kyoto, Japan.
Wenyue Du, Mong-Li Lee, Tok Wang Ling: XML Structures for Relational Data. (ppt file) WISE (1) 2001: 151-160, 3-6 December 2001, Kyoto, Japan.
Mong-Li Lee, Tok Wang Ling, Wai Lup Low: Designing Functional Dependencies for XML. (ppt file) EDBT 2002: 124-141
Yabing Chen, Tok Wang Ling, Mong Li Lee: A Case Tool for Designing XML Views (ppt file) Second Int Workshop on Data Integratino over the Web (DIWeb'02), pp 47-57, May 28, 2002, Toronto, Canada.
Yabing Chen, Tok Wang Ling, Mong Li Lee: Designing Valid XML Views. (ppt file) 21st International Conference on Conceptual Modeling (ER'2002), pp 463-477, October 7-11, 2002, Tampere, Finland.
Yuanying Mo, Tok Wang Ling Storing and Maintaining Semistructured Data Efficiently in an Object-Relational Database (ppf file) WISE 2002: 247-256, December 11-14, 2002, Singapore.
Mengchi Liu, Tok Wang Ling: Towards Declarative XML Querying WISE 2002: 127-136, December 11-14, 2002, Singapore.
Yabing Chen, Tok Wang Ling, Mong Li Lee: Automatic Generation of XQuery View Definitions from ORA-SS views (ppf file) 22nd International Conference on Conceptual Modeling (ER'2003), 13-16 October 2003, Chicago, Illinois, USA.
Xia Yang, Mong-Li Lee, Tok Wang Ling: Resolving Structural Conflicts in the Integration of XML Schemas: A Semantic Approach (ppt file) 22nd International Conference on Conceptual Modeling (ER'2003), 13-16 October 2003, Chicago, Illinois, USA, pp 520-533
Wei Ni, Tok Wang Ling GLASS: A Graphical Query Language for Semi-Structured Data (ppt file) DASFAA 2003: 363-370, March 26-28, 2003, Kyoto, Japan.
Yabing Chen, Mong Li Lee, Tok Wang Ling: Automatic Generation of SQLX View Definitions from ORA-SS Views (ppt file) DASFAA 2004, 476-481, Jeju Island, Korea, March 17-19, 2004
Daofeng Luo, Ting Chen, Tok Wang Ling, Xiaofeng Meng: On View Transformation Support for a Native XML DBMS (ppt file) DASFAA 2004, 226-231, Jeju Island, Korea, March 17-19, 2004
Zhuo Chen, Tok Wang Ling, Mengchi Liu, and Gillian Dobbie: XTree: A Declarative Query Language for XML Documents (ppt file) DASFAA 2004, 100-112, Jeju Island, Korea, March 17-19, 2004
Zhuo Chen, Tok Wang Ling, Mengchi Liu, and Gillian Dobbie: XTree: A Declarative Query Language for XML Documents Technical report of SoC, NUS, TRA1/05, January 2005 (extended version of DASFAA'2004 paper).
Enhua Jiao, Tok Wang Ling, and Chee-Yong Chan: PathStack~: A Holistic Path Join Algorithm for Path Query with Not-predicates on XML Data (ppf file) DASFAA 2005, pp 113-124, Beijing, China, April 17-20, 2005.
Yabing Chen, Tok Wang Ling, and Mong Li Lee: Maintaining Semantics in the Design of Valid and Reversible SemiStructured Views (ppt file) DASFAA 2005, pp 773-778, Beijing, China, April 17-20, 2005.
Yabing Chen, Tok Wang Ling, and Mong Li Lee, Masatake Nakanishi, Gillian Dobbie: A Semantic Approach to the Design of Valid and Reversible Semistructured Views Journal of Computing Science and Engineering, Volume 1, issue 1, pp 95 - 123, September 2007
Wei Ni and Tok Wang Ling: Translate Graphical XML Query Language to SQLX (ppt file) DASFAA 2005, pp 907-913, Beijing, China, April 17-20, 2005.
Wei Zhang, Tok Wang Ling, Zhuo Chen, and Gillian Dobbie: XDO2: A Deductive Object-Oriented Query Language for XML (ppt file) DASFAA 2005, pp 311-322, Beijing, China, April 17-20, 2005.
Xia Yang, Mong-Li Lee, Tok Wang Ling, Gillian Dobbie: A Semantic Approach to Query Rewriting for Integrated XML Data. ER 2005: 417-432
Tok Wang Ling: Capturing Semantics in XML Documents (Abstract). (ppt file) KDXD 2006, Singapore, April 9, 2006
Yabing Chen, Tok Wang Ling, Mong Li Lee, Masatake Nakanishi, and Gillian Dobbie: A Semantic Approach to the Design of Valid and Reversible Semistructured Views Journal of Computing Science and Engineering, Vol. 1, No. 1, September 2007, Pages 95-123.
Wei Ni and Tok Wang Ling Update XML Data by Using Graphical Languages ER (Tutorials, Posters, Panels & Industrial Contributions) 2007: 209-214, 5-9 November 2007, Auckland, New Zealand.

Papers on Database Design, Schema Integration, and XML Query Processing

Tok Wang Ling, Cheng Hian Goh: Logical Database Design with Inclusion Dependencies. ICDE 1992: 642-649
Mong-Li Lee, Tok Wang Ling: Resolving Structural Conflicts in the Integration of Entity Relationship Schemas. OOER 1995: 424-433
Mong-Li Lee, Tok Wang Ling: Resolving Constraint Conflicts in the Integration of Entity-Relationship Schemas. ER 1997: 394-407
Qi He, Tok Wang Ling: Resolving Schematic Discrepancy in the Integration of Entity-Relationship Schemas. ER 2004: 245-258
Qi He, Tok Wang Ling: Extending and inferring functional dependencies in schema transformation. CIKM 2004: 12-21
Qi He, Tok Wang Ling: An ontology based approach to the integration of entity-relationship schemas DKE, vol 58, no 3, pp 299-326, Sept 2006
Changqing Li and Tok Wang Ling: An Improved Prefix Labeling Scheme: A Binary String Approach for Dynamic Ordered XML DASFAA 2005: 125-137
Changqing Li and Tok Wang Ling From XML to Semantic Web. DASFAA 2005: 582-587
Daofeng Luo, Ting Chen, Tok Wang Ling, Xiaofeng Meng: On View Transformation Support for a Native XML DBMS DEXA 2004: 801-810
Jiaheng Lu, Ting Chen, Tok Wang Ling: Efficient processing of XML twig patterns with parent child edges: a look-ahead approach. CIKM 2004: 533-542
Ting Chen, Jiaheng Lu and Tok Wang Ling: On Boosting Holism in XML Twig Pattern Matching Using Structural Indexing Techniques Sigmod 2005.
Jiaheng Lu, Tok Wang Ling, Tian Yu, Changqing Li, and Wei Ni: Efficient Processing of Ordered XML Twig Pattern DEXA 2005
Jiaheng Lu, Tok Wang Ling, Chee-Yong, and Chan Ting Chen: From Region Encoding To Extended Dewey: On Efficient Processing of XML Twig Pattern Matching VLDB 2005.
Changqing Li and Tok Wang Ling QED: A Novel Quaternary Encoding to Completely Avoid Re-labeling in XML Updates CIKM 2005.
Changqing Li, Tok Wang Ling, Min Hu: Efficient Processing of Updates in Dynamic XML Data. ICDE 2006.
Changqing Li, Tok Wang Ling, Min Hu: Reuse or Never Reuse the Deleted Labels in XML Query Processing Based on Labeling Schemes. DASFAA 2006: 659-673
Changqing Li, Tok Wang Ling1, Min Hu: Efficient updates in dynamic XML data: from binary string to quaternary string VLDB J. 17(3), 2008, pp 573-601.
Tian Yu, Tok Wang Ling, Jiaheng Lu: TwigStackList~: A Holistic Twig Join Algorithm for Twig Query with Not-Predicates on XML Data. DASFAA 2006: 249-263
Huanzhang Liu, Tok Wang Ling, Tian Yu, and Ji Wu: Efficient Processing of Multiple XML Twig Queries DEXA 2006: 1-11
Bo Chen, Tok Wang Ling, M. Tamer Ozsu, and Zhenzhou Zhu: On Label Stream Partition for Efficient Holistic Twig Join DASFAA 2007, Bangkok, Thailand
Tok Wang Ling and Gillian Dobbie: Using Semantics in XML Data Management International Workshop on Scalable Web Information Integration and Service (SWIIS),in conjunction with DASFAA 2007, April 9, 2007, Bangkok, Thailand
Bo Chen, Jiaheng Lu, Tok Wang Ling: ICRA: Effective Semantics for Ranked XML Keyword Search TRC5/07, Technical Report, School of Computing, National University of Singapore, May 2007.
Liang Xu, Zhifeng Bao, Tok Wang Ling: A Dynamic Labeling Scheme using Vectors DEXA 2007, 3-7 September 2007, Regensburg, Germany.
Huayu Wu, Tok Wang Ling, and Bo Chen: VERT: a semantic approach for content search and content extraction in XML query processing ER 2007, 5-9 November 2007, Auckland, New Zealand.
Zhifeng Bao, Tok Wang Ling, Jiaheng Lu, and Bo Chen: SemanticTwig: A Semantic Approach to Optimize XML Query Processing DASFAA 2008, 19-21 March 08, New Delhi, India.
Bo Chen, Jiaheng Lu, and Tok Wang Ling: Exploiting ID References for Effective Keyword Search in XML Documents DASFAA 2008, 19-21 March 08, New Delhi, India.
Huayu Wu, Tok Wang Ling, Liang Xu, Zhifeng Bao: Performing grouping and aggregate functions in XML queries. WWW 2009: pp 1001-1010, Madrid, Spain, April 20-24, 2009.
Zhifeng Bao, Tok Wang Ling, Bo Chen, Jiaheng Lu: Effective XML Keyword Search with Relevance Oriented Ranking. ICDE 2009: pp 517-528, March 29 2009 - April 2 2009, Shanghai, China.
Zhifeng Bao, Bo Chen, Tok Wang Ling, Jiaheng Lu: Demonstrating Effective Ranked XML Keyword Search with Meaningful Result Display (Demo). DASFAA 2009: pp 750-754, Brisbane, Australia, April 21-23, 2009.
Junfeng Zhou, Zhifeng Bao, Tok Wang Ling, Xiaofeng Meng: MCN: A New Semantics Towards Effective XML Keyword Search. DASFAA 2009: pp 511-526, Brisbane, Australia, April 21-23, 2009.
Liang Xu, Tok Wang Ling, Huayu Wu, Zhifeng Bao: DDE: From Dewey to a Fully Dynamic XML Labeling Scheme SIGMOD 2009: pp 719-730. Providence, Rhode Island, from June 29th to July 2, 2009
Zhifeng Bao, Jiaheng Lu, Tok Wang Ling, Liang Xu, and Huayu Wu: An Effective Object-level XML Keyword Search in DASFAA (1) 2010: pp 93-109.
Liang Xu, Tok Wang Ling, Zhifeng Bao, Huayu Wu: Efficient Label Encoding for Range-based Dynamic XML Labeling Schemes in DASFAA (1) 2010: pp 262-276.
Huayu Wu, Tok Wang Ling, Gillian Dobbie, Zhifeng Bao, Liang Xu: Reducing Graph Matching to Tree Matching for XML Queries with ID References DEXA (2) 2010: 391-406
Huayu Wu, Tok Wang Ling, Bo Chen, Liang Xu: TwigTable: Using Semantics in XML Twig Pattern Query Processing. J. Data Semantics 15: 102-129 (2011)
Jiaheng Lu, Xiaofeng Meng, Tok Wang Ling: Indexing and querying XML using extended Dewey labeling scheme Data Knowl. Eng. 70(1): 35-59 (2011)
Zhifeng Bao, Jiaheng Lu, Tok Wang Ling and Bo Chen: Towards an Effective XML Keyword Search TKDE vol 22, no 8, pp 1077-1092, 2010
Jiaheng Lu, Tok Wang Ling, Zhifeng Bao and Chen Wang: Extended XML Tree Pattern Matching: Theories and Algorithms IEEE Trans. Knowl. Data Eng. 23(3): 402-416 (2011)
Liang Xu, Tok Wang Ling, and Huayu Wu: Labeling Dynamic XML Documents: An Order-Centric Approach IEEE Trans. Knowl. Data Eng. 24(1): 100-113 (2012)

Papers on ORA-Semantics based XML and Relational Database Keyword Query Processing

Thuy Ngoc Le, Huayu Wu, Tok Wang Ling, and Luochen Li: From Revisiting the LCA-based Approach to a New Semantics-based Approach for XML Keyword Search TRB5/11, Technical Report of School of Computing, NUS.
Luochen Li, Thuy Ngoc Le, Huayu Wu, Tok Wang Ling, and Stephane Bressan: Discovering Semantics from Data-Centric XML DEXA 2013, pp 25-39.
Yong Zeng, Zhifeng Bao, Tok Wang Ling, Guoliang Li: Efficient XML Keyword Search: From Graph Model to Tree Model DEXA (1) 2013: 25-39
Thuy Ngoc Le, Huayu Wu, Tok Wang Ling, Luochen Li, and Jiaheng Lu: From Structure-based to Semantics-based: towards Effective XML Keyword Search ER 2013.
Zhong Zeng, Zhifeng Bao, Mong Li Lee, and Tok Wang Ling: A Semantic Approach to Keyword Search over Relational Databases ER 2013.
Thuy Ngoc Le, Tok Wang Ling, H. V. Jagadish, Jiaheng Lu: Object Semantics for XML Keyword Search. DASFAA (2) 2014: 311-327.
Thuy Ngoc Le, Zhifeng Bao, Tok Wang Ling, Gillian Dobbie: Group-by and Aggregate Functions in XML Keyword Search. DEXA (1) 2014: 105-121.
Thuy Ngoc Le, Zhong Zeng, Tok Wang Ling: Finding Missing Answers due to Object Duplication in XML Keyword Search. DEXA (1) 2014: 138-155.
Thuy Ngoc Le, Zhifeng Bao, Tok Wang Ling: Schema-Independence in XML Keyword Search. ER 2014: 71-85.
Zhong Zeng, Zhifeng Bao, Gillian Dobbie, Mong-Li Lee, Tok Wang Ling: Semantic Path Ranking Scheme for Relational Keyword Queries. DEXA (2) 2014: 97-105
Zhong Zeng, Zhifeng Bao, Thuy Ngoc Le, Mong-Li Lee, Tok Wang Ling: ExpressQ: Identifying Keyword Context and Search Target in Relational Keyword Queries. CIKM 2014: 31-40
Thuy Ngoc Le, Zhifeng Bao, Tok Wang Ling: Exploiting semantics for XML keyword search. Data Knowl. Eng. 99: 105-125 (2015)
Zhifeng Bao, Yong Zeng, Tok Wang Ling, Dongxiang Zhang, Guoliang Li, H. V. Jagadish: A general framework to resolve the MisMatch problem in XML keyword search. VLDB J. 24(4): 493-518 (2015)
Zhifeng Bao, Yong Zeng, H. V. Jagadish, Tok Wang Ling: Exploratory Keyword Search with Interactive Input. SIGMOD Conference 2015: 871-876
Zhong Zeng, Zhifeng Bao, Mong-Li Lee, Tok Wang Ling: Towards An Interactive Keyword Search over Relational Databases. WWW (Companion Volume) 2015: 259-262
Zhong Zeng, Mong-Li Lee, Tok Wang Ling: Answering Keyword Queries involving Aggregates and GROUPBY on Relational Databases. EDBT 2016: 161-172
Zhong Zeng, Mong-Li Lee, Tok Wang Ling: PowerQ: An Interactive Keyword Search Engine for Aggregate Queries on Relational Databases. EDBT 2016: 596-599
Tok Wang Ling, Zhong Zeng, Thuy Ngoc Le, and Mong Li Lee: ORA-Semantics based Keyword Search in XML and Relational Databases: Workshop on Keyword Search and Data Exploration on Structured Data (KEYS 2016) in conjunction with ICDE 2016. May 20, 2016. Helsinki, Finland. pp 157-160. Thuy Ngoc Le and Tok Wang Ling: Survey on Keyword Search over XML Documents: SIGMOD Record 45(3): 17-28 (2016)