PTOLEMY II - CiteSeerX

MoML
ptolemy command assumes that the file defines an executable Ptolemy II model, and opens a control
panel to execute it. The ptexecute command executes it without a control panel. The vergil
command opens a graphical editor to edit and execute the model. The moml command uses the specified
configuration file (a MoML file containing a Ptolemy II configuration) to invoke some set of customized
views or editors on the model. The filename extension can be “.xml” or “.moml” for MoML
files. And the same XML file can be used in an applet 2 .
To get a quick start, try entering the following into a file called test.xml (This file is also available
as $PTII/ptolemy/moml/demo/test.xml):
This code defines a model in a top-level entity called “test”. By convention, we use the same name for
the top-level model and the file in which it resides. The top-level model is an instance of the Ptolemy II
class ptolemy.actor.TypedCompositeActor. It contains a director, two entities, a relation, and
two links. The model is depicted in figure 7.1, where the director is not shown. It can be run using the
command
ptolemy test.xml
You should get a window looking like that in figure 7.2. Enter “10” in the iterations box and hit the
“Go” button to execute the model for 10 iterations (leaving the default “0” in the iterations box exe-
test
ramp
output
FIGURE 7.1. Simple example in the file $PTII/ptolemy/moml/demo/test.xml.
1. These commands are executed this way on Unix systems and on Windows systems with Cygwin installed. On
other configurations, the equivalent commands are invoked in some other way.
2. An applet is a Java program that is downloaded from a web server by a browser and executed in the client’s
computer (usually within a plug-in for the browser).
192 Ptolemy II
r
plot
input