The standards
Five faces, one solid.
Each standard is a face of the same solid: one of the sides a decision has to hold up on, from meaning at the crown to time at the base. Read them top to bottom and you have read the Suite.
Meaning at the crown, time at the base
The order is part of the argument.
Meaning Integrity
The words mean something you can hold to.
The transcluded source the rest of the Suite references. Fix what a term requires in one place, and every check that uses it inherits the definition; leave it loose and the whole structure above it is measuring air. This is the standard that pins meaning, so the faces below it have something to stand on.
Structural Integrity
The system holds under pressure.
Who can act, what needs someone else's consent, and how the whole behaves as it grows, all decided and written down before they are ever tested. The standard for the structure a coordination system rests on, so no single actor can quietly bend it and no design comes apart the first time it meets real load.
Data Integrity
The evidence earns its place.
What a system may assume about what enters it, what an output owes on the way out, and how a source is graded on the way in. The uncertainty stays visible the whole way through, so nothing shaky is quietly laundered into a confident conclusion.
Evaluation Integrity
The reasoning is open to inspection.
Every step from evidence to decision written down in a form that could be shown wrong, so a conclusion is never taken on the author's word. Evaluation-chain legibility: the path from the world to the decision made checkable stage by stage.
Temporal Integrity
Sound now, not only when it was made.
Whether a reading, a proof, or a decision still holds at the moment it is used, not only when it was produced. A stale truth is its own kind of broken. The newest face being cut.
Every face is a standard you can read.
Open, versioned, and free to adopt. CSIS under Apache 2.0, the rest CC0. Nothing in the Suite asks to be taken on faith.