I think that isn't too clear. I think in LS 4 it has been called Expression Script, before it was called Expression Manager. At the end, it is the same thing.
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ritapas wrote: starting with which version Expression Manager became ExpressionScript?
The name was suggested during an internal chat. It's just a different name with no technical change. The name "Expression manager" raised questions about where to find that ExpressionManager and where to enable it. With ExpressionScript the user expectations might change a bit. Nothing more, nothing less.
