# Ortho viewport membership

## Runtime path

`EntryPoint.RunDiagnostic` reads each `OrthoViewportInfo` and calls
`PlantObjectReader.ReadObjects`. The reader resolves source Piping rows, then
`PlantViewportMembershipReader.Read` evaluates the stored query for that exact
view. It maps `MdObjectId.PrjObjectId` to a source DataLinks row and assigns a
membership status to every independent `PlantObjectSnapshot`.

| Status | Meaning | Diagnostic evidence |
| --- | --- | --- |
| `Resolved` | The source row was returned by the exact view query. | `VIEW_MEMBERSHIP_FROM_CONFIRMED_PNP_ID` |
| `ObjectOutsideView` | The source row was not returned by that confirmed query. | `VIEW_MEMBERSHIP_OBJECT_OUTSIDE_CLIP` |
| `NotResolved` | The view contract is unavailable, ambiguous, or failed. | `VIEW_MEMBERSHIP_API_UNSUPPORTED` |

No source object is treated as visible solely because it belongs to the same
model drawing. No geometry-only result is upgraded to `Resolved`.

## Plan effect

`AnnotationPlanBuilder` includes membership status in its canonical plan input.
`ObjectOutsideView`, unsupported, and unresolved objects are `Skip` operations
with stable reason codes. `Resolved` membership can progress only through the
existing annotation rules; this DryRun slice never writes an annotation.

## Paired DryRun evidence

The paired local DryRun resolved five of seven source rows through the exact
view query and classified the remaining two as `ObjectOutsideView`. Each of
the three supported commands produced an identical PlanId on its repeated
invocation. Both Launcher sessions reached `RolledBack`.

The paired command-window DBMOD output was not retained. It is intentionally
reported as `NOT RECORDED`; project-file SHA-256 inventories nevertheless had
zero delta for both CONTROL and DRYRUN copies.