Modeling Markup Language document
File type: Document file
A .moml file is an XML document written in Modeling Markup Language (MoML).
MoML files are associated with Ptolemy II and describe models made from interconnected, parameterized, hierarchical components.
File type category:
Document file
Date updated: October 17, 2026
Record marked as obsolete and not updated for a long time.
Modeling Markup Language is the XML-based modeling language used by the Ptolemy II project. A MoML document can define a model's components, parameters, hierarchy, and connections between components.
The file is part of a Ptolemy II model and stores the model description rather than the results of a simulation. Ptolemy II tools can read the document and use it to construct and edit the corresponding model.
Ptolemy II is Java-based and has been available on major desktop platforms, including Windows, macOS, and Linux. The .moml extension is now an obsolete format.
Open the .moml file with Ptolemy II, using its Vergil graphical model editor or another compatible Ptolemy tool. Ptolemy II is Java-based and can run on Windows, macOS, and Linux when the required installation is available.
The file can also be viewed as XML in a text editor, but that does not provide a model editor or simulation environment.
Open the MoML document in a compatible Ptolemy II installation and use the tool's available save or export functions if an alternative format is supported.
Converting a model to another modeling format may require rebuilding or exporting it from a compatible modeling tool, because MoML describes Ptolemy-specific components, parameters, and connections.
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