# Dependent possible values

QQQ 4.1.0-RC.5 has no `dependsOn` field property. Each pair has a TODO to add it when core ships it; automatic refresh and clearing stale selections remain frontend responsibilities.

- `collaboration_comment.parentCommentId` reuses the `collaboration_comment` TABLE source. Its field filter is `threadId EQUALS ${input.threadId} OR id EQUALS ${input.threadId}`: roots have null `threadId`, replies carry the root ID. The OR is nested inside an outer AND because core appends search criteria to the supplied filter. This lists the root and replies of just that thread; comment posting still normalizes a selected reply to its root.
- `collaboration_feature_setting.scopeName` uses `collaboration_scope_name`, a CUSTOM source driven by `otherValues.scopeType`. APP offers app names and labels. TABLE excludes `collaboration_*`, hidden tables and tables without a valid primary-key field (RC.5 metadata has one primary-key field). INSTANCE offers `instance`, since scopeName is required but the current TAGS settings reader ignores it for INSTANCE. General runtime override contracts remain deferred. Bare-ID translation prefers an app label before a table label if their names collide; searches use the selected scope's label.
- `collaboration_comment.fieldName` uses reusable CUSTOM source `collaboration_record_field_name`. It resolves `otherValues.tableName`, or reads a comment via `commentId`/`id` when tableName is absent. Other forms should supply tableName (or explicit commentId); bare id fallback is for comment forms. Fields come from permission-enforced personalized metadata, excluding hidden fields, and display `Label (name)`. Bare-ID translation retains the name because it has no table context.

The table possible-values middleware clones the field filter and calls `interpretValues` with the `input` map and FORM use case before passing it as `defaultQueryFilter` to `SearchPossibleValueSourceAction`. Tests mirror that boundary and pass `otherValues` to the core action. CUSTOM providers receive that map directly; searches honor explicit IDs first, otherwise case-insensitive name/label substring matching.