--- title: IS_YAML url: https://www.tines.com/docs/formulas/functions/is-yaml/ kind: formula-function --- *[tines.com](https://www.tines.com/llms.txt) › [Docs](https://www.tines.com/llms.txt) › [Formulas](https://www.tines.com/llm/docs/formulas.md) › [Functions](https://www.tines.com/llm/docs/formulas/functions.md)* # IS_YAML *[View on tines.com](https://www.tines.com/docs/formulas/functions/is-yaml/)* Checks if a text value is valid YAML. When `strict` is `TRUE`, the function will only return true if the input is a valid YAML document that contains key-value pairs. **Categories:** Text ## Syntax ``` IS_YAML(text, [parse_date_or_time: FALSE], [strict: FALSE]) ``` ## Examples ### Example 1 Input: ```json { "my_action": { "message": "foo: bar" } } ``` Formula: ``` IS_YAML(my_action.message) ``` Output: ```json true ``` ### Example 2 Input: ```json { "my_action": { "message": "foo: bar- foo:" } } ``` Formula: ``` IS_YAML(my_action.message) ``` Output: ```json false ``` ### Example 3 Input: ```json { "my_action": "\nLinkedDate: 2007-04-01 12:00:00\n" } ``` Formula: ``` IS_YAML(my_action, parse_date_or_time: TRUE) ``` Output: ```json true ``` ### Example 4 Input: ```json { "my_action": "\n\n foo bar\n" } ``` Formula: ``` IS_YAML(my_action, strict: TRUE) ``` Output: ```json false ``` ## Sample actions ```json { "standardLibVersion": "45", "actionRuntimeVersion": "6", "agents": [ { "disabled": false, "name": "IS_YAML", "description": null, "options": { "mode": "message_only", "loop": false, "payload": { "IS_YAML": "=IS_YAML(\"foo: bar\")" } }, "position": { "x": 0, "y": 390 }, "type": "eventTransformation", "timeSavedUnit": "minutes", "timeSavedValue": 0, "monitorAllEvents": false, "monitorFailures": false, "monitorNoEventsEmitted": null, "recordType": null, "recordWriters": [], "form": null, "createdFromTemplateGuid": null, "createdFromTemplateVersion": null, "originStoryIdentifier": "self-hosted:12c8bb2053e50b3ca4b4f45d1a3b7563:826eff0aed4e378159e8ef888a863060" } ], "links": [], "diagramNotes": [] } ```