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10/29/2022
GPC: A Pattern Calculus for Property Graphs
The development of practical query languages for graph databases runs we...
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10/27/2022
Querying Incomplete Numerical Data: Between Certain and Possible Answers
Queries with aggregation and arithmetic operations, as well as incomplet...
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02/22/2022
Revisiting Semiring Provenance for Datalog
Data provenance consists in bookkeeping meta information during query ev...
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12/24/2020
Handling SQL Nulls with Two-Valued Logic
The design of SQL is based on a three-valued logic (3VL), rather than th...
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03/15/2020
Grammars for Document Spanners
A new grammar-based language for defining information-extractors from te...
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03/15/2020
Grammars for Document Spanenrs
A new grammar-based language for defining information-extractors from te...
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12/12/2019
The theory of concatenation over finite models
We propose FC, a logic on words that combines the previous approaches of...
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12/12/2019
Finite models and the theory of concatenation
We propose FC, a logic on words that combines the previous approaches of...
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08/30/2019
Weight Annotation in Information Extraction
The framework of document spanners abstracts the task of information ext...
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08/30/2019
Annotated Document Spanners
We introduce annotated document spanners, which are document spanners th...
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01/14/2019
Complexity Bounds for Relational Algebra over Document Spanners
We investigate the complexity of evaluating queries in Relational Algebr...
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12/21/2017