function Get-ConfigurationDataArrayMergeKeyNames {
    [CmdletBinding()]
    Param(
        [Parameter(Mandatory=$true)]
        [String]
        $ArrayName,
        [AllowNull()]
        $Item
    )

    $MergeKeyMap = @{
        Instances = @("Name")
        ConfigurationOptions = @("OptionName")
        AdditionalScripts = @("ScriptName")
        Templates = @("TemplateName")
        AllNodes = @("NodeName")
        Registry = @("Key","ValueName")
    }

    if($MergeKeyMap.ContainsKey($ArrayName)){
        return $MergeKeyMap[$ArrayName]
    }

    $SearchItem = Get-ConfigurationDataArraySearchItem -Item $Item
    if($null -ne $SearchItem){
        return @($SearchItem.Name)
    }

    return @()
}