Package com.alexmerz.simpleviz

SimpleViz The SimpleViz package is an demonstration example for several JavaCC-related artices on www.alexander-merz.com.

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Description

Class Summary

SimpleViz

This is the main program for calling the SimpleViz parser

Package com.alexmerz.simpleviz Description

SimpleViz

The SimpleViz package is an demonstration example for several JavaCC-related artices on www.alexander-merz.com.

It implements a parser for the SimpleViz format. This format is a subset of the GraphViz format to describe graphs consisting of nodes, edges and sub graphs including rendering information.

The SimpleViz format differs from the GraphViz formats in the following points:

• Each statement must be finished by a semicolon.
• Lists of nodes in edge descriptions are not allowed.
• Sub graph definitions must start with the subgraph keyword and must have an identifier.
• Sub graph definitions can not be part of an edge description.
• Nodes, Sub graphs and Graphs must have an identifier, labels instead of identifiers are not allowed. (ie. "node1" -> node2 is not allowed)
• The attribute assignment must be separated using comma.
• There is no difference between the two edge operators -- and ->, the meaning depends on the graph definition.

This rules makes the SimpleViz format much easier to parse, but the the format is still compatible to the regular GraphViz format (with the exception of the last point in the list above).

Alexander Merz, 03-29-2006
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