In a single topic rule, when referencing a topic property in a condition, you can include the full topic name or the topic alias followed by dot (.) and the topic property. However, in a multiple topic rule, you must reference the topic.
For example, the following clause looks for stock event s with a stock symbol of XYZ:
WITH symbol = "XYZ"
You can also define the same condition using the alias s:
WITH s.symbol = "XYZ"
The use of an alias becomes important when you are specifying multiple topics in a rule and need to identify the topic for which you are evaluating a particular property.
You can define the same condition using the full topic name: