Incomplete Information and Certain Answers in General Data Models
Summary: Introduce a general framework using semantics-based orderings to model degrees of incompleteness, showing relational and XML certain answers as instances of a single concept. Apply it to explain naive evaluation, settle XML existence questions, expose limits of prior null-ordering models, subsume relations/documents, and derive complexity and data-exchange results. (summarized by gpt-5-mini on Feb 09 2026)
Incoming Non-self Citations Over Time
Authors
- 1. Leonid Libkin (University of Edinburgh)
BibTeX Citation
@inproceedings{libkin_pods11,
address = {New York, NY, USA},
series = {{PODS} '11},
title = {{Incomplete Information and Certain Answers in General Data Models}},
url = {https://dl.acm.org/doi/10.1145/1989284.1989294},
doi = {10.1145/1989284.1989294},
booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
publisher = {Association for Computing Machinery},
author = {Libkin, Leonid},
year = {2011}
}Incoming Citations (Sorted by Pagerank)
Showing 6 of 6 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 5,392 | Incomplete Data: What Went Wrong, and How to Fix It | 2014 | PODS | 6.1502284e-05 |
| 7,001 | When is Naive Evaluation Possible? | 2013 | PODS | 5.6250062e-05 |
| 8,912 | Optimal Security-Aware Query Processing | 2014 | VLDB | 5.2559789e-05 |
| 9,002 | Coping with Incomplete Data: Recent Advances | 2020 | PODS | 5.2394054e-05 |
| 9,169 | Efficient Approximations of Conjunctive Queries | 2012 | PODS | 5.2141412e-05 |
| 12,392 | Recovering Exchanged Data | 2015 | PODS | 4.9793485e-05 |
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Outgoing Citations (Sorted by Pagerank)
Showing 7 of 7 cited papers.
Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 24 | Data Integration: A Theoretical Perspective | 2002 | PODS | 0.00055043581 |
| 238 | Complexity of Answering Queries Using Materialized Views | 1998 | PODS | 0.00023591683 |
| 539 | The Chase Revisited | 2008 | PODS | 0.00016735847 |
| 897 | On the Decidability and Complexity of Query Answering over Inconsistent and Incomplete Databases | 2003 | PODS | 0.00013204612 |
| 1,599 | Conjunctive Queries over Trees | 2004 | PODS | 0.00010117703 |
| 2,729 | On The Integrity Of Databases With Incomplete Information | 1986 | PODS | 8.0893712e-05 |
| 12,701 | Certain Answers for XML Queries | 2010 | PODS | 4.9793485e-05 |
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Semantically Similar Papers
| # | Overall Rank | Paper | Year | Venue |
|---|---|---|---|---|
| 1 | 9,002 | Coping with Incomplete Data: Recent Advances | 2020 | PODS |
| 2 | 12,695 | Completeness of Queries over Incomplete Databases | 2011 | VLDB |
| 3 | 12,900 | Incompleteness in Information Integration | 2008 | VLDB |
| 4 | 6,146 | Identifying the Extent of Completeness of Query Answers over Partially Complete Databases | 2015 | SIGMOD |
| 5 | 14,770 | Completeness Information and Its Application to Query Processing | 1986 | VLDB |
| 6 | 4,592 | Queries with Incomplete Answers over Semistructured Data | 1999 | PODS |
| 7 | 5,392 | Incomplete Data: What Went Wrong, and How to Fix It | 2014 | PODS |
| 8 | 2,989 | Data Exchange and Incomplete Information | 2006 | PODS |
| 9 | 12,701 | Certain Answers for XML Queries | 2010 | PODS |
| 10 | 12,783 | XML with Incomplete Information: Models, Properties, and Query Answering | 2009 | PODS |