Thomas B. Cox
How to Measure Information Quality
Information Quality
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1. Accessible ( available, efficient )
2.  Interpretable ( syntax, semantics )
3. Useful ( relevant, timely [ current,  non-volatile ] )
4. Believable ( accurate, credible, consistent, complete )
The above comes from: http://www.dbnet.ece.ntua.gr/~dwq/fig2.jpg