Deriving from another property value.

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rbkprod

Is it possible to derive the value of a custom property from another custom property(ies)?
I imagine the XML would look something like this;

##Custom property 1:
~~~~~~~~~~~~~~~~~~
<property name="custom:domain">
          <title>Domain</title>
          <type>d:text</type>
          <mandatory>false</mandatory>
 </property>
##Custom property 2:
~~~~~~~~~~~~~~~~~~
<property name="custom:rights">
          <title>Rights</title>
          <type>d:text</type>
          <mandatory>false</mandatory>
 </property>

##Derive newFileName from domain and rights:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<property name="custom:newFileName">
         <title>New File Name</title>
         <type>d:text</type>
         <mandatory>false</mandatory>
         <value>custom:domain custom:rights</value> <—- Here
</property>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Something like that. I know that doesn't work. Just to show what I want to do. Anyone have an idea how the XML for this would look?

Thanks.

rbkprod

Solved with a js file.