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Metadata and Governance Overview

The Data Governance Initiative, Atlas, framework is an extensible set of core
foundational governance services – enabling enterprises to effectively and
efficiently meet their compliance requirements within Hadoop and allows
integration with the whole enterprise data ecosystem.

This will provide true visibility in Hadoop by using both a prescriptive
and forensic model, along with technical and operational audit as well as
lineage enriched by business taxonomical metadata.  It also enables any
metadata consumer to work inter-operably without discrete interfaces to
each other -- the metadata store is common.

The metadata veracity is maintained by leveraging Apache Ranger to prevent
non-authorized access paths to data at runtime.
Security is both role based (RBAC) and attribute based (ABAC).