I am not sure this is the right board for this but here goes:
According to the Revo docs in the Wiki
What are Filters?
Filters in Revolution allow you to manipulate the way data is presented or parsed in a tag.
Input Filters: Currently input filters process tag calls. More documentation to come.
Output Filters: In Revolution, Output Filters behave similarly to Phx calls in MODx 096 - except they’re built into the core.
Are filters the answer to simple logic that is currently possible with Phx - e.g. "if TV is empty do this; if it is not empty do that" - ? OR
, like has been proposed in other posts, to use snippets (conform to MVC) for such logic instead ? Many thanks.