- textual file format
	- keep it a simple as possible
	- need to parse the textual file format
- graph notation
	- simple but with sugar
- means to see graph notation
- means to edit graph notation directly
- auto-layout of graph notation
- use namespaces
- based on relations
- pure functions
- math
- integers
- floating point
- chars
- arrays
- strings
- lamda-style definitions
- recursion and closures
- multi-mode relations
- tables as values (like sets of named tuples)
- sets
- lists
- procedures with side-effects
- packet data flow
- reactive / continuous data flow
- control flow by signals / null packets
- something more powerful than monads, for relations