@startuml starter_template
' 在中国用gitee源，否则用github源
' Use gitee origin in China, otherwise use github origin
!$gitee_origin = "https://gitee.com/jarrodquan/plantuml-style/raw/master/"
!$github_origin = "https://raw.githubusercontent.com/jarrodquan/plantuml-style/master/"

' 必须定义的变量：origin_url，head_url
' Variable that must be defined: origin_url, head_url
!$origin_url = $gitee_origin
!$head_url = $origin_url + "head.puml"

' 必须包含的引用：head_url
' Reference that must be included: head_url
!include $head_url

' 可选的引用
' Optional reference
!includeurl $style_core_url

title Sequence Diagram
right header [Your name/Company name]
footer © 2019 [Your name/Company name] All Rights Reversed

Alice -> Bob: Authentication Request
Bob --> Alice: Authentication Response

Alice -> Bob: Another authentication Request
Alice <-- Bob: another authentication Response
@enduml