Fixpoint3.Ast.Ram.RowVar
case Named(Int32)Named(id) represents the unique identifier, id, of some row variable
For a program:
search e1 ∈ Edge do
search e2 ∈ Edge do
...
e1 and e2 would be the identifiers. Identifiers will only be defined
once in a program, but can be reffered to from elsewhere.