Validation, Exchange Control, and Long-Term Reuse

A file that opens is only the beginning of an exchange decision. This category explains how to define what the recipient needs, compare the information that matters, record the limits of the evidence, control changes, and preserve enough context for later retrieval.

Overview

Start with an acceptance case: name the source, destination, direction, representation, versions or profiles, downstream task, information layers, and evidence that will decide whether the handoff is usable. Then test representative packages rather than a convenient sample, and keep syntax or conformance results separate from preservation and task acceptance.

Reproducible delivery extends the test result to the actual package: dependencies, resolver or path context, settings, reports, and known exclusions must travel with the payload. When a route, translator, profile, or source changes, compare it with the accepted baseline instead of assuming that a successful first transfer or a round trip is reversible. Long-term reuse adds representation information, provenance, fixity, access context, and retrieval tests; it does not promise permanent application behavior or parametric editability.

Articles

Read the articles in this order when you need to accept or preserve a handoff:

1. Define an Acceptance Case for a CAD Exchange — state the purpose, required layers, evidence, thresholds, and failure decisions before export.
2. Test Exchange Packages: Compare What Must Survive — choose representative assets and compare source and destination results at the right level.
3. Conformance, Validation, and Fit for Purpose Are Different Claims — interpret checkers, standards, profiles, and certificates without overclaiming.
4. Make a CAD Handoff Reproducible — package dependencies, route context, and acceptance evidence so the recipient can repeat the test.
5. Control Updates and Round Trips Without Losing the Baseline — re-test changes and classify expected transformation versus unacceptable loss.
6. Prepare CAD Data for Long-Term Retrieval and Reuse — preserve the information and context needed for a future reader, not just a file that once opened.

Where this category connects

Categories 002–008 define the geometry, structure, intent, engineering, spatial, visual, and production layers that an acceptance case may need to test. Category 009 supplies format and profile conditions; Category 010 supplies bounded route evidence; Category 011 helps diagnose a failed check. Use this category to decide what evidence closes the loop for the stated purpose.