Closed World Databases Opened Through Null Values
Summary: Introduces locally controlled open-world databases, where nulls selectively open attributes, tuples, or relations within an otherwise closed-world schema. Distinguishes unknown, does-not-exist, and a novel open null, with formal semantics and extended relational operations. (summarized by gpt-5.6-luna on Jul 24 2026)
Incoming Non-self Citations Over Time
Authors
- 1. Georg Gottlob (Vienna University of Technology)
- 2. Roberto Zicari (Polytechnic University of Milan)
BibTeX Citation
@article{gottlob_vldb88,
title = {{Closed World Databases Opened Through Null Values}},
author = {Gottlob, Georg and Zicari, Roberto},
journal = {PVLDB},
series = {{VLDB} '88},
pages = {50},
year = {1988}
}Incoming Citations (Sorted by Pagerank)
Showing 7 of 7 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 967 | Recovering Information from Summary Data | 1997 | VLDB | 0.00012794553 |
| 2,989 | Data Exchange and Incomplete Information | 2006 | PODS | 7.7755739e-05 |
| 4,471 | Data Exchange and Schema Mappings in Open and Closed Worlds | 2008 | PODS | 6.5848385e-05 |
| 5,507 | Troubles with Nulls, Views from the Users | 2022 | VLDB | 6.1009808e-05 |
| 5,739 | Capturing Missing Tuples and Missing Values | 2010 | PODS | 6.011429e-05 |
| 5,740 | Relative Information Completeness | 2009 | PODS | 6.011429e-05 |
| 11,602 | Hardware-Efficient Data Imputation through DBMS Extensibility | 2024 | VLDB | 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 |
|---|---|---|---|---|
| 10 | Extending the Data Base Relational Model to Capture More Meaning | 1979 | SIGMOD | 0.00075944947 |
| 354 | A DBMS Prototype to Support Extended NF2 Relations: An Integrated View on Flat Tables and Hierarchies | 1986 | SIGMOD | 0.00020222123 |
| 549 | Non First Normal Form Relations To Represent Hierarchically Organized Data | 1984 | PODS | 0.00016563595 |
| 628 | Database Relations with Null Values (Extended Abstract) | 1982 | PODS | 0.0001544126 |
| 640 | Data Structures for an Integrated Data Base Management and Information Retrieval System | 1982 | VLDB | 0.00015288268 |
| 1,418 | Null Values in Data Base Management: A Denotational Semantics Approach | 1979 | SIGMOD | 0.00010731577 |
| 2,820 | Determining When a Structure Is a Nested Relation | 1985 | VLDB | 7.9715759e-05 |
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Semantically Similar Papers
| # | Overall Rank | Paper | Year | Venue |
|---|---|---|---|---|
| 1 | 2,989 | Data Exchange and Incomplete Information | 2006 | PODS |
| 2 | 7,001 | When is Naive Evaluation Possible? | 2013 | PODS |
| 3 | 13,431 | A Family of Incomplete Relational Database Models | 1989 | VLDB |
| 4 | 2,729 | On The Integrity Of Databases With Incomplete Information | 1986 | PODS |
| 5 | 5,507 | Troubles with Nulls, Views from the Users | 2022 | VLDB |
| 6 | 5,739 | Capturing Missing Tuples and Missing Values | 2010 | PODS |
| 7 | 13,442 | A Sound and Complete Query Evaluation Algorithm for Relational Databases with Null Values | 1988 | SIGMOD |
| 8 | 4,130 | On Relational Algebra With Marked Nulls | 1984 | PODS |
| 9 | 1,418 | Null Values in Data Base Management: A Denotational Semantics Approach | 1979 | SIGMOD |
| 10 | 628 | Database Relations with Null Values (Extended Abstract) | 1982 | PODS |