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# CEL in Parameters

Parameters that contain CEL expressions are set like any other string parameter only the value of the parameter is evaluated to a CEL expression. For example create a CEL expression on a CollectionCreate node that sets to the /root/geo location:

    TIME = 0
    root = NodegraphAPI.GetRootNode()
    collection = NodegraphAPI.CreateNode( 'CollectionCreate',\
        root)
    c = collection.getParameter( 'CEL' )
    c.setValue( "( (/root/geo) )", TIME )

For more on CEL, and collections using CEL, see Collections and CEL.