# Reserved terms

List of reserved terms

This document contains a list of reserved terms, organized by category. Attempting to use these terms will result in a warning, informing you that you must use a different word instead.

![Reserved term warning in the UI](https://hygraph.com/images/classic-docs/user-guides/reserved-terms-errormessage.png)

## GraphQL type names

- int
- boolean
- date
- datetime
- enum
- float
- fragment
- input
- interface
- json
- mutation
- node
- query
- scalar
- string
- subscription
- union

## Reserved non system type names

- Color
- ColorInput
- Entity
- HEX
- Id
- Locale
- Location
- LocationInput
- RGBA
- RGBAHue
- RGBATransparency
- RichText
- RichTextAST
- ScheduledOperation
- ScheduledRelease
- Search
- Status
- User

## Reserved non system field names

- createdat
- createdby
- documentInStages
- history
- id
- locale
- localizations
- publish
- publishedat
- publishedby
- status
- updatedat
- updatedby
- versions