How to get the IDs of the RTC attributes, enumeration attributes literals, workflow states that come from a process template?

I am using RTC 6.0.1

I am testing a new plug-in for RTC integration with Slack. In order to configure the conditions for triggering the notification into the Slack channels, we need to know the attributes, literals, workflow states... we can get that from the Process Configuration Source the customized attributes, and states... but not easy to find the IDs of the attributes and states that come with the Process template like Priority, priority literals, task states...

Any idea on how to get those IDs easily?

Thanks!