graph TD
Start[Look at nomenclatural acts] --> HasDOI
HasDOI{"Has DOI?"}
HasDOI --> |Yes|IsOA{"Is OA?"}
HasDOI --> |No|NoDOI[<b>Undiscoverable</b>]
IsOA -->|No|Closed["<b>Closed</b><br/>Requires subscription or <br/>one-off per-article payment"]
IsOA -->|Yes|Open{<b>Open</b><br/>What kind of OA?}
Open -->|Gold|Gold["<b>Author pays</b> article<br/> processing charge,<br/> free to read, all <br/>articles in journal are OA"]
Open -->|Green|Green["<b>Author archives</b><br/> copy in <br/>institutional <br/>repository"]
Open -->|Bronze|Bronze["Available on <br/>publisher's site, <br/>not formally <br/>licensed for reuse."]
Open -->|Hybrid|Hybrid["<b>Author pays</b> article<br/> processing charge to make <br/>article open, journal includes <br/>a mix of OA and closed <br/>articles & charges subscription fees"]
Open -->|Diamond|Diamond["Free to <br/>publish & read"]
classDef Gold fill:#fde769;
class Gold Gold;
classDef Green fill:#79be78;
class Green Green;
classDef Bronze fill:#d29766;
class Bronze Bronze;
classDef Hybrid fill:#feb352;
class Hybrid Hybrid;