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» A Collection Operator for Graph Transformation
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ICCS
2005
Springer
14 years 1 months ago
Hierarchical Knowledge Integration Using Layered Conceptual Graphs
Abstract We describe the ‘Hierarchical as View’ approach to knowledge integration from heterogeneous sources. This is based on a novel representation called Layered Conceptual ...
Madalina Croitoru, Ernesto Compatangelo, Chris Mel...
WEA
2007
Springer
111views Algorithms» more  WEA 2007»
14 years 1 months ago
Vertex Cover Approximations on Random Graphs
Abstract. The vertex cover problem is a classical NP-complete problem for which the best worst-case approximation ratio is 2− o(1). In this paper, we use a collection of simple g...
Eyjolfur Asgeirsson, Clifford Stein
DATESO
2004
134views Database» more  DATESO 2004»
13 years 9 months ago
Designing Indexing Structure for Discovering Relationships in RDF Graphs
Discovering the complex relationships between entities is one way of benefitting from the Semantic Web. This paper discusses new approaches to implementing -operators into RDF quer...
Stanislav Barton
FASE
2007
Springer
14 years 1 months ago
Information Preserving Bidirectional Model Transformations
Abstract. Within model-driven software development, model transformation has become a key activity. It refers to a variety of operations modifying a model for various purposes such...
Hartmut Ehrig, Karsten Ehrig, Claudia Ermel, Frank...
AGTIVE
2007
Springer
13 years 11 months ago
Visualization, Simulation and Analysis of Reconfigurable Systems
Meta-modeling is well known to define the basic concepts of domain-specific languages in an object-oriented way. Based on graph transformation, an abstract meta-model may be enhanc...
Claudia Ermel, Karsten Ehrig