Umfang:
1 Online-Ressource (186 Seiten)
ISBN:
9781681734316
Serie:
Synthesis Lectures on Data Management #51
Inhalt:
Intro -- Foreword -- Acknowledgments -- Introduction -- Data Models -- Property Graph Model -- Variations of the PGM -- Specializations -- Structural Extensions -- Data Representation Extensions -- Summary -- Bibliographic and Historical Notes -- Query Languages -- Basic Functionality -- Regular Path Queries -- Conjunctive Graph Queries -- Conjunctive Regular Path Queries -- Unions of Conjunctive Regular Path Queries -- Relation Algebra -- Regular Property Graph Queries -- Regular Property Graph Logic -- Regular Property Graph Algebra -- Equivalence and Complexity of RPGLog and RPGA -- RPGQ in Context -- Important Fragments of RPGQ -- Extending RPGQ For Composability -- RPGQ and Practical Graph Query Languages -- Bibliographic and Historical Notes -- Constraints -- Preliminaries -- Graph Functional Dependencies -- Syntax -- Semantics -- Satisfiability -- Implication -- Validation -- Graph Entity Dependencies -- Definition and Special Cases -- Preliminaries -- Chasing Graph Entity Dependencies -- Satisfiability, Implication, and Validation -- Extension to Graph Denial Constraints -- Applications and Practical Impact of Graph Dependencies -- Other Constraints for Graph Data Management -- Graph Neighborhood Constraints -- Graph-to-Graph Constraints -- Bibliographic and Historical Notes -- Query Specification -- Path Query Specification -- The Definability Problem for Graph Queries -- Complexity of Definability for Graph Queries -- From Definability to Learnability of Graph Queries -- Interactive Graph Query Specification -- Graph Searching for Querying -- Query-Driven Graph Exploration -- Bibliographic Notes -- Data Structures and Indexes -- Conceptual Schemas of PGM Representation -- Direct Representation of Ternary Relations -- Value Compression -- Value Indexing -- Pivoted Representation of Ternary Relations -- Adjacency Indexing
Inhalt:
Uncompressed Adjacency Representation -- Compressed Adjacency Representation -- Reachability Indexing -- General Considerations -- Techniques -- Structural Indexing -- Bibliographic and Historical Notes -- Query Processing -- Query Pipeline -- Subgraph Matching Queries -- DFS-Based algorithms -- BFS-Based Algorithms -- Discussion -- Regular Path Queries -- Relational Algebra and Datalog-Based Approaches -- Finite Automata-Based Approaches -- Unions of Conjunctive Regular Path Queries -- Bibliographic and Historical Notes -- Physical Operators -- Transitive Closure -- Multi-Way Joins -- Cardinality Estimation -- Cardinality of Paths -- Cardinality of Patterns -- Further Optimizations -- Bibliographic and Historical Notes -- Research Challenges -- Bibliography -- Authors' Biographies -- Blank Page
Weitere Ausg.:
ISBN 9781681734309
Sprache:
Englisch
Mehr zum Autor:
Voigt, Hannes 1980-
