Semantic Representations and Query Languages for Or-sets

Summary: Presents a query language for or-sets, distinguishing ‘‘structural’’ vs ‘‘conceptual’’ queries via a normalization framework and proving lossless normalization for a broad class of queries. Gives upper bounds on normalization cost and a Rounds-style semantics. (summarized by gpt-5-mini on Feb 09 2026)

Paper ID: 985
Venue: PODS
Year: 1993
Pagerank: 6.6466406e-05
Overall Rank: 4,522 | 68.98%
DOI: 10.1145/153850.153854

Incoming Non-self Citations Over Time

Authors

1. Leonid Libkin (University of Pennsylvania)
2. Limsoon Wong (University of Pennsylvania)

BibTeX Citation

@inproceedings{libkin_pods93,
        address = {New York, NY, USA},
        series = {{PODS} '93},
        title = {{Semantic Representations and Query Languages for Or-sets}},
        url = {https://dl.acm.org/doi/10.1145/153850.153854},
        doi = {10.1145/153850.153854},
        booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
        publisher = {Association for Computing Machinery},
        author = {Libkin, Leonid and Wong, Limsoon},
        year = {1993}
}

Incoming Citations (Sorted by Pagerank)

Showing 6 of 6 citing papers.

Rank	Citing Paper	Year	Venue	Pagerank
1,777	Deciding Containment for Queries with Complex Objects (Extended Abstract)	1997	PODS	9.7849758e-05
2,514	From Complete to Incomplete Information and Back	2007	SIGMOD	8.4818577e-05
5,167	Enriching Data Imputation with Extensive Similarity Neighbors	2015	VLDB	6.3370748e-05
6,185	Containment of Nested XML Queries	2004	VLDB	5.9488248e-05
12,993	Normalizing Incomplete Databases	1995	PODS	5.093636e-05
13,022	Tutorial: Languages for Collection Types	1994	PODS	5.093636e-05

Outgoing Citations (Sorted by Pagerank)

Showing 1 of 1 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank	Cited Paper	Year	Venue	Pagerank
1,690	Incomplete Objects - A Data Model for Design and Planning Applications	1991	SIGMOD	0.00010001011

Semantically Similar Papers

#	Overall Rank	Paper	Year	Venue
1	13,097	On the power of Rule-Based Languages with Sets	1991	PODS
2	8,971	Equivalence of Nested Queries with Mixed Semantics	2009	PODS
3	8,120	Formal Semantics and Analysis of Object Queries	2003	SIGMOD
4	1,890	Relational Expressive Power of Constraint Query Languages	1996	PODS
5	12,993	Normalizing Incomplete Databases	1995	PODS
6	5,062	Equivalence of Queries Combining Set and Bag-Set Semantics	2006	PODS
7	1,864	The Expressiveness of a Family of Finite Set Languages	1991	PODS
8	3,128	On Accessing Object-Oriented Databases: Expressive Power, Complexity, and Restrictions	1989	SIGMOD
9	13,129	Complexity of Query Processing in Databases with OR-Objects	1989	PODS
10	4,336	Languages for Relational Databases over Interpreted Structures	1997	PODS