"explains the purpose and effect of each [data protection] principle, and gives practical examples to illustrate how the principles apply in practice. We hope that, by answering many frequently asked questions about data protection, the Guide will prove a useful source of practical advice to those who have day-to-day responsibility for data protection."
Separately, for anyone who's not seen it, the European Data Protection Supervisor's website has a clear and detailed Q&A section (and glossary of data protection terminology) which again are intended to give practical guidance.
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