ConditionIsPresent - sorengranfeldt/mre GitHub Wiki
Condition xsi:type=ConditionIsPresent
This condition can be used to check whether a metaverse attribute is present. The name of the metaverse attribute to check is specified in the MVAttributeName tag (see below).
If the metaverse attribute is present, the condition is met.
<ConditionBase xsi:type="ConditionIsPresent">
<MVAttribute>adAccountName</MVAttribute>
</ConditionBase>