@startuml skinparam componentStyle rectangle [group by **isbn**] as groupby rectangle input #White [ {{ Title <b>Input component book1 [ **title** 7 Habits of Highly Effective People **isbn** 978-1982137274 **author_name** Sean Covey ] component book2 [ **title** 7 Habits of Highly Effective People **isbn** 978-1982137274 **author_name** Stephen Covey ] component book3 [ **title** The Power of Habit **isbn** 978-0812981605 **author_name** Charles Duhigg ] }} ] rectangle intermediate #White [ {{ title <b>Intermediate rectangle "978-1982137274" as 7habits #White { component book11 [ **title** 7 Habits of Highly Effective People **isbn** 978-1982137274 **author_name** Sean Covey ] component book12 [ **title** 7 Habits of Highly Effective People **isbn** 978-1982137274 **author_name** Stephen Covey ] book11 -[hidden]d- book12 } rectangle "978-0812981605" as power #White { component book13 [ **title** The Power of Habit **isbn** 978-0812981605 **author_name** Charles Duhigg ] } }} ] [aggregate by **author_name**] as agg rectangle output #White [ {{ title <b>Output component book111 [ **title** 7 Habits of Highly Effective People **isbn** 978-1982137274 **authorNames** [Sean Covey, Stephen Covey] ] component book121 [ **title** The Power of Habit **isbn** 978-0812981605 **authorNames** [Charles Duhigg] ] }} ] input -d-> groupby groupby -d-> intermediate intermediate -d-> agg agg -d-> output @enduml
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