# UpdateGuidelineDocumentInput > Input in domain **Guidelines** - HTML: [UpdateGuidelineDocumentInput.html](UpdateGuidelineDocumentInput.html) - Raw SDL: [UpdateGuidelineDocumentInput.sdl](UpdateGuidelineDocumentInput.sdl) - Covered by: [llms.txt](../llms.txt) Input for updating a guideline document. ## Input fields - `id`: `ID!` _(beta)_ — The ID of the guideline document to update. - `title`: `String!` _(beta)_ — The new title of the document. - `language`: `String` = `null` _(beta)_ — Language code the title is written in. Omit it (or pass the default language) to update the base title; pass a non-default language to update that translation.