---
title: Fields and object schemas for Elastic Security
description: This reference section provides details on the fields Elastic Security uses to display data in the UI and Elastic Security JSON object schemas: ECS fields...
url: https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/reference/security/fields-and-object-schemas
products:
  - Elastic Security
---

# Fields and object schemas for Elastic Security
This reference section provides details on the fields Elastic Security uses to display data in the UI and Elastic Security JSON object schemas:
- [ECS fields required or used to analyze and display data](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/reference/security/fields-and-object-schemas/siem-field-reference)
- [Timeline object schema](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/reference/security/fields-and-object-schemas/timeline-object-schema)
- [Alert schema](https://docs-v3-preview.elastic.dev/elastic/docs-content/pull/4236/reference/security/fields-and-object-schemas/alert-schema)