G
G. De Giacomo
Researcher at Sapienza University of Rome
Publications - 14
Citations - 803
G. De Giacomo is an academic researcher from Sapienza University of Rome. The author has contributed to research in topics: Web query classification & Query optimization. The author has an hindex of 10, co-authored 14 publications receiving 786 citations.
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Proceedings ArticleDOI
Information integration: conceptual modeling and reasoning support
TL;DR: The authors present a general architecture for information integration that explicitly includes a conceptual representation of the application and provide various arguments in favor of the conceptual level in the architecture and of automated reasoning over the conceptual representation.
Proceedings ArticleDOI
Answering regular path queries using views
TL;DR: This work is the first to exhibit decidability in cases where the language for expressing the query and the views allows for recursion, and characterize data, expression, and combined complexity of the problem, showing that the proposed algorithms are essentially optimal.
Journal ArticleDOI
Reasoning on regular path queries
TL;DR: It is demonstrated that the basic services for reasoning about two way regular path queries are decidable, thus showing that the limited form of recursion expressible by these queries does not endanger the decidability of reasoning.
Proceedings ArticleDOI
View-based query processing and constraint satisfaction
TL;DR: This work studies view based query processing for the case of regular-path queries, which are the basic querying mechanisms for the emergent field of semistructured data and presents two methods for computing PTIME rewritings of specific forms.
Proceedings ArticleDOI
Source integration in data warehousing
TL;DR: This work presents a novel approach to conceptual modeling for source integration, which allows for suitably modeling the global concepts of the application, the individual information sources, and the constraints among different sources.