CWA-Solutions for Data Exchange Settings with Target Dependencies
Summary: Extend Libkin's CWA-solutions to settings with target dependencies: for weakly acyclic targets the core is the unique minimal CWA-solution, and CWA-solutions and positive-query certain answers are PTIME-computable though maximal CWA-solutions may not be unique. Certain answers for CQs with one inequality are co-NP-hard; Existence-of-CWA-Solutions is PTIME for weakly acyclic settings but undecidable in general, implying undecidability of Existence-of-Universal-Solutions. (summarized by gpt-5-mini on Feb 09 2026)
Incoming Non-self Citations Over Time
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Incoming Citations (Sorted by Pagerank)
Showing 5 of 5 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 1,866 | Update Exchange with Mappings and Provenance | 2007 | VLDB | 0.00010272139 |
| 3,909 | Chase Termination for Guarded Existential Rules | 2015 | PODS | 6.6375375e-05 |
| 4,466 | Data Exchange and Schema Mappings in Open and Closed Worlds | 2008 | PODS | 6.1601459e-05 |
| 4,752 | Normalization and Optimization of Schema Mappings | 2009 | VLDB | 5.9481448e-05 |
| 5,897 | Answering Aggregate Queries in Data Exchange | 2008 | PODS | 5.2842198e-05 |
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Outgoing Citations (Sorted by Pagerank)
Showing 8 of 8 cited papers.
Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 494 | Data Exchange: Getting to the Core | 2003 | PODS | 0.00021805832 |
| 621 | Schema Mappings, Data Exchange, and Metadata Management | 2005 | PODS | 0.00019005115 |
| 1,494 | Inverting Schema Mappings | 2006 | PODS | 0.00011693148 |
| 2,211 | XML Data Exchange: Consistency and Query Answering | 2005 | PODS | 9.2771941e-05 |
| 3,424 | Data Exchange: Computing Cores in Polynomial Time | 2006 | PODS | 7.110765e-05 |
| 3,502 | Data Exchange and Incomplete Information | 2006 | PODS | 7.0366655e-05 |
| 3,643 | The Complexity of Data Exchange | 2006 | PODS | 6.8862411e-05 |
| 4,705 | Locally Consistent Transformations and Query Answering in Data Exchange | 2004 | PODS | 5.9830709e-05 |
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Semantically Similar Papers
| Overall Rank | Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 4,466 | Data Exchange and Schema Mappings in Open and Closed Worlds | 2008 | PODS | 6.1601459e-05 |
| 4,705 | Locally Consistent Transformations and Query Answering in Data Exchange | 2004 | PODS | 5.9830709e-05 |
| 12,082 | Getting Unique Solution in Data Exchange | 2013 | VLDB | 4.1945683e-05 |
| 2,829 | Computing Cores for Data Exchange: New Algorithms and Practical Solutions | 2005 | PODS | 8.0546963e-05 |
| 5,897 | Answering Aggregate Queries in Data Exchange | 2008 | PODS | 5.2842198e-05 |
| 494 | Data Exchange: Getting to the Core | 2003 | PODS | 0.00021805832 |
| 3,424 | Data Exchange: Computing Cores in Polynomial Time | 2006 | PODS | 7.110765e-05 |
| 2,715 | Peer Data Exchange | 2005 | PODS | 8.2433779e-05 |
| 3,502 | Data Exchange and Incomplete Information | 2006 | PODS | 7.0366655e-05 |
| 3,643 | The Complexity of Data Exchange | 2006 | PODS | 6.8862411e-05 |