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+**MD file:** `Data Owner.md`  
+**Estimated reading time:** 8–10 minutes
+
+# Data Owner
+
+## Definition
+
+A **Data Owner** is the person or business role accountable for a data domain, dataset, or important business definition.
+
+The Data Owner has authority over meaning, acceptable use, access, quality expectations, retention, and important business rules.
+
+## Simple Mental Model
+
+> **The Data Owner decides what the data means and what should happen with it.**
+
+IT may host the system. Data Engineering may build the pipeline. An analyst may build the dashboard. None of them automatically owns the business meaning.
+
+## How It Works
+
+Example:
+
+```text
+Employee Data
+Business owner: HR
+IT: operates systems
+Data team: pipelines and reporting
+```
+
+Ownership is accountability, not technical administration.
+
+## Example
+
+Marketing and Product disagree on `Active User`.
+
+The data team should not silently choose the definition because it owns Power BI.
+
+A Data Owner should approve the business definition, which can then flow into [[Business Glossary]] and [[Semantic Layer]].
+
+## How It Fits Into the Bigger Picture
+
+```text
+[[Data Governance]]
+        ↓
+[[Data Owner]]
+Accountability / decision authority
+        ↓
+[[Data Steward]]
+Day-to-day quality and maintenance
+```
+
+## My Company / Real-World Context
+
+Potential ownership could look like:
+
+- Advertising Revenue → Finance / Advertising business leader
+- Employee Data → HR
+- Content Metadata → Programming / Content
+- Streaming Audience KPI → agreed business owner
+
+Your Data Governance team can facilitate and implement without owning every business concept.
+
+## CTO Perspective
+
+A common failure is confusing system ownership with data ownership.
+
+A useful question is:
+
+> **Who has the authority to make the final business decision about this data?**
+
+If nobody can answer, ownership is unclear.
+
+### Questions to Ask
+
+- Who is accountable for this data?
+- Who approves its business definition?
+- Who approves access?
+- Who establishes acceptable quality?
+- Is the owner a business role or merely the person who built the system?
+- Is ownership documented?
+
+## Meeting Scenario
+
+**Situation:** Marketing and Product ask your data team to decide the definition of Active User.
+
+**Possible response:**
+
+> "Data can quantify the options and explain the consequences, but this is ultimately a business-definition decision. We need an accountable owner who can approve the definition, after which we'll implement it consistently."
+
+## Key Takeaways
+
+- A Data Owner is accountable for business meaning and appropriate management.
+- Ownership is not the same as building or hosting the system.
+- Business departments should normally own business meaning.
+- [[Data Governance]] should make ownership explicit.
+
+## Related Concepts
+
+- [[Data Steward]]
+- [[Data Governance]]
+- [[Business Glossary]]
+- [[Metadata]]
+- [[Data Catalog]]
+- [[Semantic Layer]]
+- [[KPI]]