flowchart TB Student["Student
pseudonymous (Ch. 6)"]:::student CM["ConceptMastery
summary vertex"]:::mastery Concept["Concept
node in the Learning Graph DAG"]:::mastery LS["LearningSession
summary vertex"]:::engage Touched["Page / MicroSim / Question"]:::engage Ann["edge carries:
event_count, dwell_ms"]:::ann Student -->|HAS_MASTERY| CM CM -->|OF_CONCEPT| Concept Student -->|HAD_SESSION| LS LS -->|TOUCHED| Touched Touched -.-> Ann classDef student fill:#37474f,stroke:#1c2529,color:#fff,font-size:15px classDef mastery fill:#2a9d8f,stroke:#1f7a6f,color:#fff,font-size:15px classDef engage fill:#e9a23b,stroke:#b8791f,color:#222,font-size:15px classDef ann fill:#f3ece0,stroke:#b3a67e,color:#4a4326,font-size:13px linkStyle default stroke:#999,stroke-width:2px