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opengeode 0.992

A tiny, free SDL editor for TASTE

Latest Version: 1.5.2


OpenGEODE is a tiny open-source SDL editor that is developed for the purpose of providing an easy to use and free state machine editor and Ada code generator to the TASTE toolchain from the European Space Agency, running in combination with ESA’s ASN.1 “Space Certifiable” ASN.1 compiler.

SDL is the Specification and Description Language (Z100 standard from ITU-T).

This is NOT related to the graphical Simple DirectMedia Layer libraries!

Visit for more information about SDL. Visit to get a full-featured commercial SDL tool and support

![alt tag](icons/opengeode-screenshot.png)


  • Graphical editor of SDL processes and procedures.
  • SDL2010 features: FOR loops in task symbols, hierarchical states
  • Works on pure PR+CIF files (textual SDL notation) - no fancy proprietary save format
  • Supports ASN.1 data types, including the Value notation - check this page to know more about our ASN.1 compiler and tools
  • Generates Ada code with ASN.1 types using TASTE ASN.1 “space-certified” (SPARK) compiler
  • Extensive syntax and semantic checks
  • Automatic conversion to Statechart diagrams
  • Save the complete or parts of the model to PNG/SVG/PDF files
  • Hyperlinks (link a symbol content to any external document or web page)
  • Zoom in, zoom-out
  • Context-dependent text auto-completion
  • Syntax highlighting
  • Undo/Redo, Copy-Paste
  • (Limited) VIM mode - You can use :wq or :%s,search,replace,g, and /search pattern



There are three major dependencies for OpenGEODE:

  • Pyside (the Qt bindings for Python)
  • Python ANTLR Runtime
  • PyGraphviz (Linux only - not available on Windows)

If you use pip to install OpenGEODE, these dependencies should be installed automatically. However, note that installing PySide from pip requires some work and is not straightforward.

If you are using a Linux Debian-based distribution (including Ubuntu), I would recommended to install PySide using your package manager: You should also install pygraphviz using the same method, for convenience.

`bash $ sudo apt-get install python-pyside pyside-tools python-pygraphviz pip `

The Python 2.7 ANTLR 3.1.3 runtime is not part of Debian packages. Install it with pip (or download and install manually the package):

`bash $ pip install antlr_python_runtime singledispatch `

On Windows:

You need to download and install Python, Pyside, and pip (binaries are available on respective websites)

On FreeBSD:

PySide is available through the ports. You can also use easy_install to install it. Use pip to install the ANTLR runtime (see above)

Installation from source

You can get the source from the TASTE repositories or from GitHub

`bash $ svn co opengeode `

Or `bash $ git clone opengeode `

Then enter the opengeode directory and as root, type:

`bash $ make install `

Information and contact

OpenGEODE is part of the TASTE project.

Find more information and download at

OpenGEODE is developed and maintained by Maxime Perrotin maxime (dot) perrotin (at) esa (dot) int

The background pattern was downloaded from

The ASN.1 compiler (ASN1Scc) that OpenGEODE is based on was developed by George Mamais and Thanassis Tsiodras for the European Space Agency. Information at


License is LGPL (see file LICENSE) The fonts are the fonts from Ubuntu, check licence in file FONT-LICENSE.TXT


0.99 (04/2014)
  • Refactoring of the backend engine, now using singledispatch
  • Support of hierachical states
  • Minor bugfixes
  • Added support for FOR loops In a task, use “for x in range([start], stop, [range]): … endfor” or “for x in sequenceOfvariable: … endfor”
  • Default symbol size is smaller
  • Various minor bugfixes
  • added support for default value when declaring a variable e.g. DCL myVar myType ::= { x 5, y 2 }; default value must be a ground expression
File Type Py Version Uploaded on Size
opengeode-0.992.tar.gz (md5) Source 2014-05-19 4MB