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Fix SCRIPT transformation documentation #1944

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Fix SCRIPT transformation documentation #1944

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0006795
Fix SCRIPT transformation documentation
J-N-K Dec 4, 2022
e80b872
improvement
J-N-K Dec 4, 2022
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3 changes: 2 additions & 1 deletion addons/transformations.md
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Expand Up @@ -66,8 +66,9 @@ The `SCRIPT` transformation is available from the framework and needs no additio
It allows transforming values using any of the available scripting languages in openHAB (JSR-223 or DSL).

The script needs to be placed in the `$OPENHAB_CONF/transform` folder with an extension `.script` regardless of the actual script type.
When referencing a transformation, the script type must be prepended to the filename (e.g. `dsl:stringlength` for the DSL version of `stringlength.script`).
When referencing a transformation, the script type must be prepended to the filename (e.g. `dsl:stringlength.script` for the DSL version of `stringlength.script`).
Please note that you cannot have transformations with the same name and different languages as the file-extension is always `script`.
The script type depends on the scripting engine used, it is usually either the file extension or the MIME-type of the scripts.

The input value is injected into the script context as a string variable `input`.
The result needs to be returned from the script, it can have be `null` or value of type that properly implements `.toString()`.
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