• Publications
  • Influence
Efficient Structural Joins on Indexed XML Documents
Queries on XML documents typically combine selections on element contents, and, via path expressions, the structural relationships between tagged elements. Structural joins are used to find all pairsExpand
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Stable models and non-determinism in logic programs with negation
Previous researchers have proposed generalizations of Horn clause logic to support negation and non-determinism as two separate extensions. In this paper, we show that the stable model semantics forExpand
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Multilingual Knowledge Graph Embeddings for Cross-lingual Knowledge Alignment
Many recent works have demonstrated the benefits of knowledge graph embeddings in completing monolingual knowledge graphs. Inasmuch as related knowledge bases are built in several differentExpand
  • 105
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Optimization of Nonrecursive Queries
State-of-the-art optimization approaches for relational database systems, e.g., those used in systems such as OBE, SQL/DS, and commercial INGRES. when used for queries in non-traditional databaseExpand
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Graceful database schema evolution: the PRISM workbench
Supporting graceful schema evolution represents an unsolved problem for traditional information systems that is further exacerbated in web information systems, such as Wikipedia and public scientificExpand
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Database Relations with Null Values
  • C. Zaniolo
  • Mathematics, Computer Science
  • J. Comput. Syst. Sci.
  • 1 February 1984
Abstract A new formal approach is proposed for modeling incomplete database information by means of null values. The basis of our approach is an interpretation of nulls which obviates the need forExpand
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Big Data Analytics with Datalog Queries on Spark
There is great interest in exploiting the opportunity provided by cloud computing platforms for large-scale analytics. Among these platforms, Apache Spark is growing in popularity for machineExpand
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The LDL System Prototype
The logic data language (LDL) system provides a declarative logic-based language and integrates relational database and logic programming technologies so as to support advanced data andExpand
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Advanced Database Systems
Advanced Database System by Carlo Zaniolo, Stefano Ceri, Christos Faloutsos, Richard T. Snodgrass, V.S. Subrahmanian, and Roberto Zicari Preface 1 Introduction Part I Active Databases 2 Syntax andExpand
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Negation and Aggregates in Recursive Rules: the LDL++ Approach
The problem of allowing non-monotonic constructs, such as negation and aggregates, in recursive programs represents a difficult challenge faced by current research in deductive databases. In thisExpand
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