Example of a Datum handler that can reference another datum based on its path (rough and dirty)

Invoke-TestHandlerAction.ps1

function Invoke-TestHandlerAction {
    Param(
        $Password,

        $test,

        $Datum,

        $Node,

        $InputObject
    )
@"
    Action: $handler
    InputObject: $InputObject
    Node: $($Node|FL *|Out-String)
    Params: 
$($PSBoundParameters | Convertto-Json)
"@ | Write-Verbose
    $datumLink = [regex]::Matches($InputObject,"^\[TEST=(?<data>[\w\W]*)\]$")[0].groups['data'].value -split '\\'
    [scriptblock]::Create("`$Datum.$($datumLink -join '.')").Invoke()
}