use_case.plantuml

@startuml Use Case UML Diagram
left to right direction
skinparam packageStyle rectangle
actor User as u

package Interpreter {
  usecase "Lexical Analysys" as LA
  usecase "Syntax Analysis" as SYA
  usecase "Semantic Analysis" as SMA
  usecase "Program Evaluation" as PE
  usecase "Syntax Error" as SYE
  usecase "Check Symbol table" as ST
  usecase "Semantic Error" as SME
  (SYA) .> (LA) : include
  (SMA) .> (SYA) : include
  (PE) .> (SMA) : include
  (SMA) .> (ST) : include
  (SYE) .> (SYA) : extend
  (SME) .> (SMA) : extend

}
u --> LA
@enduml