eKoeS/symphony-2 — comment on commit 26149e87ffc194bde8bc1fdcd5061703e21bdde7
File: symphony/content/content.blueprintsdatasources.php line 544
By brendo:

`{}` means evaluate, without them it means use the value as is.

Your suggestion is interesting, but it's not as flexible. At the moment you can chain certain conditions together, `$handle:$param:$something` and parameters can come from a number of sources, be that pages, datasources or custom events/code.

The way forward is a different concept altogether, similar to the S3 executions filters (Do not execute when, execute when) which gives you total control of if you want to the datasource to execute or not.