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The Design of an Extendible Graph Editor

  • Kartonierter Einband
  • 212 Seiten
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Graphs can be used to convey information about relationships in many applications. State transition diagrams, PERT/CPM charts, and... Weiterlesen
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Beschreibung

Graphs can be used to convey information about relationships in many applications. State transition diagrams, PERT/CPM charts, and entity-relationship diagrams are a few examples of many applications involving graphs. Typically, nodes in the graph represent items in the application and the edges represent the relationships among these items. A graph editor is an interactive tool that presents a graph to the user pictorially and allows the user to edit the graph. This monograph presents the design of an extendible graph editor, which is a graph editor that can be adapted easily to many different application areas. Several fundamental and recurring problem areas associated with graph editors are investigated and a solution is proposed for each. The topics investigated are: - Graph layout: a layout constraint mechanism is presented which can easily be combined with various graph layout algorithms. - Graphical abstraction: a novel clustering techniquecalled edge concentration is presented which can reduce the apparent complexity of the graph. - Persistence: the graph structures produced by theeditor can be kept in long-term storage using a standardized, external format for graphs. - Extendibility: the design of the proposed graph editor makes it easy to adapt to various applications. To demonstrate their feasibility, the proposed solutions have been incorporated into EDGE, an extendible graph editor protoype.

Klappentext

Graphs can be used to convey information about relationships
in many applications. State transition diagrams, PERT/CPM
charts, and entity-relationship diagrams are a few examples
of many applications involving graphs. Typically, nodes in
the graph represent items in the application and the edges
represent the relationships among these items. A graph
editor is an interactive tool that presents a graph to the
user pictorially and allows the user to edit the graph.
This monograph presents the design of an extendible graph
editor, which is a graph editor that can be adapted easily
to many different application areas. Several fundamental and
recurring problem areas associated with graph editors are
investigated and a solution is proposed for each. The topics
investigated are:
- Graph layout: a layout constraint mechanism is presented
which can easily be combined with various graph layout
algorithms.
- Graphical abstraction: a novel clustering techniquecalled
edge concentration is presented which can reduce the
apparent complexity of the graph.
- Persistence: the graph structures produced by theeditor
can be kept in long-term storage using a standardized,
external format for graphs.
- Extendibility: the design of the proposed graph editor
makes it easy to adapt to various applications.
To demonstrate their feasibility, the proposed solutions
have been incorporated into EDGE, an extendible graph editor
protoype.



Inhalt
Definition of terms.- Related work: Graph editors.- Layout algorithms and layout constraints.- Graphical abstraction.- Persistence.- Extendibility.- EDGE: An extendible graph editor.- Summary and future research.- Conclusion.

Produktinformationen

Titel: The Design of an Extendible Graph Editor
Untertitel: 6th Colloquium, Toulouse, April 17-19, 1984. Proceedings
Autor:
EAN: 9783540570905
ISBN: 354057090X
Format: Kartonierter Einband
Herausgeber: Springer Berlin Heidelberg
Anzahl Seiten: 212
Gewicht: 330g
Größe: H235mm x B155mm x T11mm
Jahr: 1993
Untertitel: Englisch
Auflage: 1993

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