segast

SegmentQL Grammar (https://github.com/lytics/lio/tree/develop/src/segments/segast)

Segment    = Expr
Expr       = {"op": Op, "args": Args}
Op         = "and" | "or" | "not" | ">" | ">=" | "<" | "<=" | "=" | "!="
                    | "between" | "contains" | "exists" | "in" | "intersects"
                    | "include" | "like" | "*"
Args       = [ Node, Node, ... ]
Node       = Expr | Literal | Identifier | SegmentRef
Literal    = {"val":   "..."}
Identifier = {"ident": "..."}
SegmentRef = {"ident":   "..."}

Exhibit: the original segast grammar for nostalgia's sake