Results 11 to 20 of about 1,586,831 (297)

Functional querying in graph databases [PDF]

open access: yesVietnam Journal of Computer Science, 2017
The paper is focused on a functional querying in graph databases. We consider labelled property graph model and mention also the graph model behind XML databases. An attention is devoted to functional modelling of graph databases both at a conceptual and
Jaroslav Pokorný
doaj   +5 more sources

Modelling of Graph Databases

open access: yesJournal of Advanced Engineering and Computation, 2017
Comparing graph databases with traditional,e.g., relational databases, some important database features are often missing there. Particularly, a graph database schema including integrity constraints is mostly not explicitly defined, also a conceptual ...
Jaroslav Pokorny
doaj   +3 more sources

GRAPH DATABASES AND GRAPH VIZUALIZATION [PDF]

open access: yes, 2013
The thesis presents graph databases. Graph databases are a part of NoSQL databases, which is why this thesis presents basics of NoSQL databases as well. We have focused on advantages of graph databases compared to rela- tional databases. We have used one of native graph databases (Neo4j), to present more detailed processing of graph databases.
Klančar, Jure
core   +3 more sources

Graph databases in systems biology: a systematic review. [PDF]

open access: yesBrief Bioinform
Graph databases are becoming increasingly popular across scientific disciplines, being highly suitable for storing and connecting complex heterogeneous data.
Mazein I   +12 more
europepmc   +2 more sources

Neural Graph Databases

open access: yesCoRR, 2022
Graph databases (GDBs) enable processing and analysis of unstructured, complex, rich, and usually vast graph datasets. Despite the large significance of GDBs in both academia and industry, little effort has been made into integrating them with the predictive power of graph neural networks (GNNs).
Maciej Besta   +7 more
openaire   +3 more sources

Semantic acyclicity on graph databases [PDF]

open access: yesProceedings of the 32nd ACM SIGMOD-SIGACT-SIGAI symposium on Principles of database systems, 2013
It is known that unions of acyclic conjunctive queries (CQs) can be evaluated in linear time, as opposed to arbitrary CQs, for which the evaluation problem is NP-complete. It follows from techniques in the area of constraint-satisfaction problems that semantically acyclic unions of CQs---i.e., unions of CQs that are equivalent to a union of acyclic ...
Pablo Barceló Baeza   +2 more
openaire   +9 more sources

A logical approach to graph databases

open access: yesJournal of Logical and Algebraic Methods in Programming, 2022
Peer ...
Pino Blanco, Elvira   +3 more
openaire   +5 more sources

Context-free path querying with all-path semantics using matrices with sets of intermediate vertices [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2021
The study considers the problem of context-free path querying with all-path query semantics. This problem consists in finding all paths of the graph, the labels on the edges of which form words from the language generated by the input context-free ...
Rustam Sh. Azimov, Semyon V. Grigorev
doaj   +1 more source

Standard Framework for Comparison of Graph Partitioning Techniques

open access: yesJISR on Computing, 2015
Graph Partitioning is used to distribute graph partitions across nodes for processing. It is very important in the pre-processing step for distributed graph processing.
Mudasser Iqbal, Saif-ur-Rahman
doaj   +1 more source

Capturing Topology in Graph Pattern Matching [PDF]

open access: yes, 2011
Graph pattern matching is often defined in terms of subgraph isomorphism, an np-complete problem. To lower its complexity, various extensions of graph simulation have been considered instead.
Huai, Jinpeng   +9 more
core   +1 more source

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