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OpenMusic DocumentationOM 6.6 User Manual > Visual Programming I > Boxes > Objects – Factory Boxes > Import/Export
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Importing/Exporting Factory Box Values

Instances Files

The current value of a factory box can be exported or imported as a file to or from any location in the computer. Exporting an instance is a means to preserve the musical result of a computation.

Both procedures take place in the patch editor, via a contextual menu. Instances are identified by the .omi extension – "i" for "instance".

Export Procedure

  1. To export the instance from a factory box, Ctrl / right click on the box and select "Export".

  2. Choose an export location and file name on tyour hard-disk.

Import Procedure

  1. To import an instance in a factory box, Ctrl / right click on the box and select "Import".

  2. Choose a .omi file to import.

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Compatibility

Mind importing a suitable instance file in a given factory editor. In case of incopmpatible object, OM will display an error message and the box contents won't be modified.

It may be more convenient to create an instance box[1] out of the box value. Instance boxes can be saved as global variables[2] in a dedicated package of the Library, the Globals package.

About Instances and Global Variables, See :

External File Formats

Some objects (particularly, musical object) can be imported/exported from/to standard external formats (e.g. MIDI, MusicXML, etc.)

In this case, some additional options will be displayed in the Import and Export menus.

Importing/Exporting Score Objects
  1. Instance

    An actual object created at runtime, out of a given class. In OM, more specifically, an object created when evaluating a factory box. An instance can be saved as a global variable.

    ⤷ SHIFT click on an outlet – especially the first outlet representing the self, the whole object – of a factory box to materialize an instance.

  2. Global variable

    An instance of OM object that has been saved in order to be used in other programs. Global variables are visible from the Library window and stored as .omi files in the Globals folder of the workspace.

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