A New Basis for the Weak Instance Model
Summary: New weak-instance model treats nulls as mere lack of information (not existent-but-unknown), enabling logical theories without universal quantifiers while preserving dependency and query-answering properties. Drops the universal-instance assumption and gives principled semantics for universal-relation interfaces rather than heuristic rewrites. (summarized by gpt-5-mini on Feb 09 2026)
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Incoming Citations (Sorted by Pagerank)
Showing 3 of 3 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 12,936 | Efficient Updates to Independent Schemes in the Weak Instance Model | 1990 | SIGMOD | 4.1905499e-05 |
| 12,947 | Updating Databases in the Weak Instance Model | 1989 | PODS | 4.1905499e-05 |
| 12,997 | Independent Database Schemes Under Functional And Inclusion Dependencies | 1987 | VLDB | 4.1905499e-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 |
|---|---|---|---|---|
| 38 | Testing Implications Of Data Dependencies | 1979 | SIGMOD | 0.0007528369 |
| 131 | Can We Use The Universal Instance Assumption Without Using Nulls? | 1981 | SIGMOD | 0.00043719033 |
| 500 | Independent Database Schemas (Extended Abstract) | 1982 | PODS | 0.00021622167 |
| 529 | Database Relations with Null Values (Extended Abstract) | 1982 | PODS | 0.00020825533 |
| 748 | Partition Semantics for Relations | 1985 | PODS | 0.00017194862 |
| 1,167 | On Computing Restricted Projections of Representative Instances | 1985 | PODS | 0.0001354084 |
| 7,070 | Optimal Computation of Total Projections with Unions of Simple Chase Join Expressions | 1984 | SIGMOD | 4.8380576e-05 |
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| Overall Rank | Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 13,020 | Relaxing the Universal Relation Scheme Assumption | 1985 | PODS | 4.1905499e-05 |
| 3,503 | Dependency Satisfaction in Databases with Incomplete Information | 1984 | VLDB | 7.0332465e-05 |
| 485 | A New Approach to Database Logic | 1984 | PODS | 0.00022061287 |
| 1,062 | Assumptions in Relational Database Theory | 1982 | PODS | 0.00014353951 |
| 3,931 | On The Complexity And Axiomatizability Of Consistent Database States | 1984 | PODS | 6.6192327e-05 |
| 8,958 | Understanding Queries by Conditional Instances | 2022 | SIGMOD | 4.417947e-05 |
| 12,947 | Updating Databases in the Weak Instance Model | 1989 | PODS | 4.1905499e-05 |
| 500 | Independent Database Schemas (Extended Abstract) | 1982 | PODS | 0.00021622167 |
| 12,936 | Efficient Updates to Independent Schemes in the Weak Instance Model | 1990 | SIGMOD | 4.1905499e-05 |
| 9,098 | Querying Weak Instances | 1984 | PODS | 4.3917473e-05 |