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**Fundamental Abstractions**

**Query space, Q, with partial ordering:**

**Elements can be marginal tables, conditionals, ***k*-groupings, regressions, or other data summaries.
*Released set:* R(*t*), and implied *Unreleasable set:* U(*t*).
*Releasable frontier:* maximal elements of R(*t*).
*Unreleasable frontier:* minimal elements of U(*t*).

*Risk *and *Utility* defined on subsets of Q.

*Risk Measure*: identifiability of small cell counts.
*Utility*: reconstructing table using log-linear models.
**Release rules must balance risk and utility: **
**R-U Confidentiality map. **
**General Bayesian decision-theoretic approach.**

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