> ## Documentation Index
> Fetch the complete documentation index at: https://docs.doblier.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Data Model & Schemas

> Event envelope, CI model alignment, incident record, and graph model.

<Note>Draft skeleton. Owner: architect.</Note>

## Event envelope

Registry subjects, required fields, tier tagging, schema compatibility mode.

## CI model (CSDM alignment)

How incoming events map to configuration items in the truth graph.

## Incident record

Structure and the per-incident **evidence trail** fields that make every correlation auditable.

## Graph model

Node and edge types in Neo4j; how blast radius is computed.

## Schema evolution

Compatibility rules, deprecation process, and the 30-minute local schema cache behavior during registry outage.