The International Standard Serial Number (ISSN) that identifies this periodical. You can repeat this property to (for example) identify different formats of this periodical.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-24 UTC."],[],[],null,["Type name: [Periodical](/workspace/gmail/markup/reference/types/Periodical)\n\nExtends [Series](/workspace/gmail/markup/reference/types/Series)\n\n| Name | Type | Description |\n|------|------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| issn | [Text](/workspace/gmail/markup/reference/types/Text) | The International Standard Serial Number (ISSN) that identifies this periodical. You can repeat this property to (for example) identify different formats of this periodical. |"]]
