How many $Target/Host or $Target/Host/Host ... etc do you need to go

Question

Hello
Can someone please help me with the following question as I am learning authoring at the moment, thanks
I see from Brian videos that some times you need to use just $Target/Property... and other times $Target/Host/Property...
or even $Target/Host/Host/Property... and so on.
I get the idea (or at least I think I do), in as much as the further you are away from the Host (e.g. the deeper down embedded in the XML) you have to step back up using Host or Host/Host etc. a bit like when transversing a file system using ..\.. or ..\..\..
So for a registry discovery you would say $Target/Host/Property... e.g. use Host one time.
My question is.
is this always the case for a discovery?
How do I know when I should use $Target/Property and when to use $Target/Host and $Target/Host/Host etc.. is there any easy well to tell?
Thank you
AAnotherUser__
AAnotherUser__

Answer 1

Just a little modified previous script:
function Get-SCOMClassHostElement {
param(
[Microsoft.EnterpriseManagement.Configuration.ManagementPackClass]
[Parameter(Mandatory = $true)]
$ManagementClass,
[Switch]
[Parameter(Mandatory = $false)]
$KeyOnly
function Get-SCOMClassKeyProperty {
param(
$ManagementClass,
$MPElementPath
$ManagementClass.PropertyCollection | ? {$_.Key} | % {$MPElementPath + "Property[Type=`"" + $_.Identifier.Domain[0]+"!"+$ManagementClass.Name+"`"]/"+$_.Name+"`$"}
If ($ManagementClass.Hosted) {
Get-SCOMClassKeyProperty -ManagementClass $ManagementClass.FindHostClass() -MPElementPath ($MPElementPath + "Host/")
If ($ManagementClass.Base) {
Get-SCOMClassKeyProperty -ManagementClass (Get-SCOMClass $ManagementClass.Base.Id) -MPElementPath $MPElementPath
function Get-SCOMClassAllProperty {
param(
$ManagementClass,
$MPElementPath
$ManagementClass.PropertyCollection | % {$MPElementPath + "Property[Type=`"" + $_.Identifier.Domain[0]+"!"+$ManagementClass.Name+"`"]/"+$_.Name+"`$"}
If ($ManagementClass.Base) {
Get-SCOMClassAllProperty -ManagementClass (Get-SCOMClass $ManagementClass.Base.Id) -MPElementPath $MPElementPath
$MPElementPath = "`$Target/"
[Array]$ManagementClassProperty = Get-SCOMClassKeyProperty -ManagementClass $ManagementClass -MPElementPath $MPElementPath
If (!$KeyOnly) {
[Array]$ManagementClassProperty += Get-SCOMClassAllProperty -ManagementClass $ManagementClass -MPElementPath $MPElementPath
$ManagementClassProperty | Select-Object -Unique
New-SCOMManagementGroupConnection
$ManagementClassName = "Microsoft.SQLServer.Database"
$ManagementClass = Get-SCOMClass -Name $ManagementClassName
Get-SCOMClassHostElement -ManagementClass $ManagementClass
Vladimir Zelenov | http://systemcenter4all.wordpress.com