---
title: "CDP referential integrity IDs"
date: "2025-01-29T17:34:01+00:00"
summary: "Discover CDP Referential Integrity IDs: Learn about entity types for summary, non-summary, XRef, machine learning, and system entities."
image:
type: "page"
url: "/customer-data-platform/cdp-referential-integrity-ids"
id: "f96c6684-4f1d-43b6-b22f-c54a4fa4766d"
---

CDP Referential Integrity IDs are associated with various types of entities. 

The following are the types of entities:

*   [Summary Entities](/customer-data-platform/summary-entities "Summary Entities")
*   [Non-Summary Entities](/customer-data-platform/non-summary-entities "Non-Summary Entities")
*   [XRef Entities](/customer-data-platform/xref-entities-0 "XRef Entities")
*   [Machine Learning Entities](/customer-data-platform/machine-learning-entities "Machine Learning Entities")
*   [CDP System Entities](/customer-data-platform/cdp-system-entities "CDP System Entities")