Concept

Relations: when to use which

Typed links tell an agent why a requirement exists, how it is achieved and what limits it.

For: Product owner, Project lead

The ones you use most

RelationUse it when
RefinesA requirement details another one level up the why-chain (objective ← business ← stakeholder ← functional / non-functional).
RealizesA technical requirement says how a functional or non-functional one is achieved.
ConstrainsA constraint limits specific requirements. Without it, the constraint applies project-wide.
ReplacesA new record supersedes an old one of the same type.
Conflicts withTwo records cannot both hold. An open conflict blocks Authority.