Do you have to Discovery ALL the Properties defined on a Class before an instance of said class will be created

Question

Hello
I am learning how to create management packs with VSAE and have a question please.
When defining a Class based on LocalApplication (which I believe already has a hosting relationship with Windows Computer and therefore no need to create a hosting relationship?)
let say I define two properties one called Version and the other Vendor both based on registry values, so I include the discovery of these regsitry values in my discovery (along with the regsitry key exists to check the actual app is installed).
Now if I have a Server with only two of the above three registry items created e.g. the actual Key and Version string value but not vendor string value. Will an instance of the Class be discovered and thereby viewable in the 'discovered inventory' view?
Or do ALL properties have to be present (as defined on the class definition) for an instance of said class to be created?
Thank you
AAnotherUser__
AAnotherUser__

Answer 1

Hello Vladimir thanks for taking the time to reply
So if I have three properties definded on my custom class, none of which are key properties and I only discover two of them (as the registry key or what ever is missing for the last property) the class should still be discovered as there are no key properties
for the custom class and therefore no key properties missing from the discovery, is that correct please?
Also I understand I have to Discover any key properties of the classes parent/s
for example
 <InstanceSettings>
    <Settings>
      <Setting>
        <Name>$MPElement[Name="Windows!Microsoft.Windows.Computer"]/PrincipalName$</Name>
        <Value>$Target/Property[Type="Windows!Microsoft.Windows.Computer"]/PrincipalName$</Value>
      </Setting>
     <Setting>
        <Name>$MPElement[Name="System!System.Entity"]/DisplayName$</Name>
        <Value>$Target/Property[Type="Windows!Microsoft.Windows.Computer"]/NetbiosComputerName$</Value>
      </Setting>
    </Settings>
I have done this, but my Class is not being discovered.
Then I saw a post which had the following, under the Class Discovery Section (along with the other properties of the class)
 <Property TypeID="System!System.Entity" PropertyID="DisplayName"/>
Therefore perhaps I need to add this as a property as well as an InstanceSetting?
I am using SCOM 2007 R2 at the moment
Thanks very much
AAnotherUser__
AAnotherUser__