SYSE.19:0.1 - Terms and Distinctions
| Name in this pattern | What it denotes |
|---|---|
| engineering source | A claim-bearing episteme that an Agent uses while performing engineering Work. Record its publication, carrier, or access relation only when that relation changes the use. |
| source edition | An episteme related to an earlier episteme by the C.2.1 edition-continuity predicate. A revision label or date is evidence to inspect, not the edition relation itself. |
| replacement source | A later episteme proposed for the predecessor’s use when edition continuity is absent or unresolved. Its applicability is decided for that use. |
| publication or carrier change | A change to availability or presentation—for example, another URL, file, layout, form, or publication occurrence. Compare claim content before treating it as a semantic change. |
| material claim change | A change in claim content or applicability that can alter engineering action—for example, a changed proposition, scope, assumption, limit, evidence status, or MethodDescription statement. |
| direct reliance | A named engineering decision or Work result whose justification or content depends on a source claim as a premise under stated conditions. A citation or link is discovery evidence until the receiving content confirms that dependence. |
| affected reach | The smallest set of decisions reached through direct-reliance relations whose engineering action can change because of the material claim change. |
| revalidation Work | Work that rechecks an affected claim or decision under the current configuration, conditions, Method, evidence needs, and authority. |
| decision disposition | One choice from the closed set used here: preserve, narrow, reopen, supersede, withdraw reliance, or blocked. |
The source episteme, its publication, the claim-change observation, planned revalidation, performed Work, returned evidence, and engineering decision have separate identities. An Agent performs revalidation Work. Equipment, models, repositories, and the engineered System are examples of other participants; state each direct relation.