Q&A: What is Sinn Féin's Abú database and why is it in the news?

Sinn Féin leader Mary Lou McDonald: Database controversy stemmed after concerns were flagged that certain data may be held on voters without their knowledge,

The Data Protection Commissioner has ruled that the Sinn Féin Abú database was legal, but that parts of its operation were not transparent.

A 53-page audit by the DPC on the data protection activities of political parties comes after the Sinn Féin database made headlines in the summer.