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doi:10.1016/0165-6074(87)90094-9 
Copyright © 1987 Published by Elsevier Science B. V.
MLED: A multiple abstraction level graphical editor
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Reiner W. Hartenstein and Udo Welters
Available online 14 August 2003.
Abstract
This paper describes a very flexible new interactive graphics editor for VLSI design. The hierarcical editor handles several abstraction levels at the same, from layout up to RT and higher levels. The number of levels is extensible. By the MLED cell model it is possible to generaate mixed level representations and to make information, captured at one level valid to all other levels. A unique user interface at all defined abstractions levels is supported by powerful graphical means of the MLED system. The interface, graphical and data base access, the data formatt transformations an the dialogue system allow an easy integration of other CAD tools. This paper gives a brief introduction to the MLED System, describes the MLED cell model in detail, showing a few examples and gives an overview of the MLED system features, concerning compatability to other systems, users interface and tool interfaces.
