# UpdateGuidelinePageHeadingInput > Input in domain **Guidelines** - HTML: [UpdateGuidelinePageHeadingInput.html](UpdateGuidelinePageHeadingInput.html) - Raw SDL: [UpdateGuidelinePageHeadingInput.sdl](UpdateGuidelinePageHeadingInput.sdl) - Covered by: [llms.txt](../llms.txt) ## Input fields - `id`: `ID!` _(beta)_ — The `id` of the `GuidelinePageHeading` that should be updated. - `data`: `UpdateGuidelinePageHeadingDataInput!` _(beta)_ — `GuidelinePageHeading` data. - `language`: `LanguageCode` = `null` _(beta)_ — Language code the `title` is written in. Omit it to update the title in the main language. - `locale`: `String` = `null` _(beta)_ — The locale tag ("de", "de-DE") the `title` is written in. Omit it to update the title in the main language.