action core_get_journal_by_issn { label: "Find journal by ISSN" description: "Returns a journal with given ISSN identifier." provider: core method: GET path: "/journals/get/{issn}" encoding: json input: { type: "object" properties: { issn: { type: "string" } } required: ["issn"] additionalProperties: false } output: { type: "object" additionalProperties: true } }