this

The designator this describes the current note (i.e. the note currently in focus). The focus of this can vary slightly by context:

• in $Rule: the note whose rule is running
• in $OnAdd: the note that is being added
• in $AgentQuery: the note that is being examined
• in $AgentAction: the alias that is being examined
• in find(), collect(), etc: the note that is being examined

Beware of nesting changing the context. Consider the following rule:

$Text=find($MyString==$Name(this)) 

Although the overall context is a rule, the rule contains a find, which in turn holds the 'this' designator. Therefore in the above example 'this' is evaluated in the context of the nested find() and not as in a simple $Rule.