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