Get Expression rule by name

Hi there,

 

does anybody know whether it possible to get an expression rule by its name?

Problem context:
In my application (software request), I want to maintain software.
Some software needs to be approved before installation.
I am thinking about designing the (sometimes complex) rules for identifying the approval user groups in terms of expression rules.
(Doing this with decision tables is not possible since I need a CDT as rule input)
These rules would then be referenced by name as an attribute of the software CDT.
Within the software request process, I then want to get the referenced expression rule and execute it to get the approval group to forward the approval task to.

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