Fig. 2
From: PaperBot: open-source web-based search and metadata organization of scientific literature
PaperBot microservices information flow. Rectangles represent web applications running an embedded servlet container and its main methods (CRUD is the acronym for Create, Read, Update, and Delete). The arrows represent the flow direction of the data between services. Circled numbers points to the discussion on each component’s specifics included in “Implementation” section of the text