From 892166abfff464e225fa46e5722441d9a8afbe30 Mon Sep 17 00:00:00 2001
From: Gregory Dubois-Felsmann <gpdf@ipac.caltech.edu>
Date: Mon, 5 Feb 2024 10:16:11 -0800
Subject: [PATCH] Add Mermaid diagram of a draft entity-relationship model for
 DP0.2

Eventually we should try to generate this automatically from Felis.
---
 doc/dp02_dc2.mmd | 64 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 doc/dp02_dc2.mmd

diff --git a/doc/dp02_dc2.mmd b/doc/dp02_dc2.mmd
new file mode 100644
index 00000000..bf32c7b6
--- /dev/null
+++ b/doc/dp02_dc2.mmd
@@ -0,0 +1,64 @@
+---
+title: DP0.2 Table Relationships
+---
+erDiagram
+    Object {
+        long objectId UK
+        long tract FK
+        long patch FK
+    }
+    Object ||--o{ MatchesTruth : matches
+    Object }o..|| CoaddPatches : "found in"
+    Object ||--|{ ForcedSource : seeds
+
+    Source {
+        long ccdVisitId FK
+        long visit FK
+    }
+    Source }o..|| CcdVisit : "found in"
+    Source }o..|| Visit : "found in"
+    ForcedSource {
+        long objectId FK
+        long ccdVisitId FK
+        long tract FK
+        long patch FK
+    }
+    ForcedSource }o..|| CcdVisit : "measured in"
+    DiaObject {
+        long diaObjectId UK
+        long nDiaSources
+    }
+    DiaObject |o..|{ DiaSource : "built from"
+    DiaObject ||--|{ ForcedSourceOnDiaObject : "seeds"
+    DiaSource {
+        long diaObjectId FK
+        long ccdVisitId FK
+    }
+    DiaSource }o..|| CcdVisit : "found in"
+    ForcedSourceOnDiaObject {
+        long diaObjectId FK
+        long ccdVisitId FK
+        long tract FK
+        long patch FK
+    }
+    ForcedSourceOnDiaObject }o..|| CcdVisit : "measured in"
+    CcdVisit {
+        long ccdVisitId UK
+        long visitId FK
+    }
+     Visit {
+        long visit UK
+    }
+    Visit ||--|{ CcdVisit : contains
+    CoaddPatches {
+        long lsst_tract PK
+        long lsst_patch PK
+    }
+    MatchesTruth {
+        string id_truth_type FK
+        long match_objectId FK
+    }
+    TruthSummary {
+        string id_truth_type PK
+    }
+    TruthSummary ||--o{ MatchesTruth : matches