Is your feature request related to a problem? Please describe.
The selection algebra doesn't support >= and <= on property selectors (e.g. select * & p.PROP <= 10). A very related issue is that the equality operator doesn't exist (?) so we can't compare enums (integers) or strings.

Describe the solution you'd like
The solution I'd like would be * & p.P1>=500 & p.P2=="MyFilter" with == a synonymous to =.

I'd like to add support to this, but don't know if I know enough for it.