架构入门 schemas-gs

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• TL;DR: This page explains how Adobe Experience Platform standard and relational XDM schemas define the structure of your data so you can model profiles, behavioral events, and relational entities in Journey Optimizer.

Intents:

• Understand what an XDM schema is and how it structures ingested Experience Platform data.
• Distinguish standard schemas from relational schemas.
• Choose a class (record or time-series) and field groups for a standard schema.
• Model relational entities for Orchestrated campaigns.
• Understand the permanence of enabling a schema for Real-Time Customer Profile.

Glossary:

• XDM schema: an abstract definition of a real-world object that structures data ingested into Experience Platform (product-specific)
• Standard schema: a hierarchical schema that uses classes and field groups to capture record or time-series data (product-specific)
• Relational schema: a flat, non-hierarchical schema that does not use classes or field groups, used for record data for relational entities and primarily in Orchestrated campaigns (product-specific)
• Class: the schema component that defines data behavior (record or time-series) (product-specific)
• Field group: the schema component that adds specific fields to a schema (product-specific)
• Real-Time Customer Profile: the profile that standard schemas power for segmentation and personalization (product-specific)

Guardrails:

• Enabling a schema for Real-Time Customer Profile is permanent: once enabled, the schema cannot be disabled or deleted (hard constraint).
• Datasets built on an enabled schema can be disabled or deleted separately, but doing so removes the associated profile records and may affect segmentation and activation workflows.
• Relational schemas are flat and do not use classes or field groups.

Terminology:

• Do not confuse: “standard schema” (hierarchical, uses classes and field groups) ≠ “relational schema” (flat, no classes or field groups)
• Do not confuse: “class” (defines record versus time-series behavior) ≠ “field group” (adds specific fields)
• Do not confuse: “record” behavior ≠ “time-series” behavior

FAQ:

• Q: What are the two types of schemas? — Standard schemas (hierarchical) and relational schemas (flat, non-hierarchical).
• Q: What is the difference between a class and a field group? — A class defines the base behavior (record or time-series); field groups add specific fields to the schema.
• Q: When are relational schemas used? — Primarily in Journey Optimizer Orchestrated campaigns, for relational entities such as bookings, products, or stores.
• Q: Can I undo enabling a schema for Profile? — No; once enabled, the schema cannot be disabled or deleted, although its datasets can be disabled or deleted separately.
• Q: How do I create a relational schema? — Create it manually or import via DDL, then link schemas to define relationships and ingest data from supported sources.