Source of Truth
Definition
Section titled “Definition”Canonical registry of where each metric, dimension, and entity should be read from, with ownership and SLAs.
Schema / Parameters
Section titled “Schema / Parameters”- Entity:
name,primary_key,system_of_record,refresh_sla. - Metric:
name,definition,aggregation,window,owner. - Dimension:
name,domain,allowed_values,lineage.
Defaults
Section titled “Defaults”- One owner per metric/entity; documented calculation and caveats.
Examples
Section titled “Examples”- Revenue from ledger, marketing spend from ad platforms with reconciliation table.
Limits
Section titled “Limits”- Avoid duplicative metrics across tools; route consumers to the SoT.