From: Will Budicm <redacted>
Date: Sun, 25 Oct 2020 00:18:02 +0000 (+1100)
Subject: Entity Relationship Diagram for Lifelog.
X-Git-Url: https://lifelog.hopto.org/gitweb/?a=commitdiff_plain;h=e2ba7fb74b3dd45590bcbddd90b5e7ed8b0f7a85;p=LifeLog.git

Entity Relationship Diagram for Lifelog.
---

diff --git a/lifelog.er b/lifelog.er
new file mode 100644
index 0000000..8c0d40c
--- /dev/null
+++ b/lifelog.er
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+title {label: "Entity-Relationship Diagram For Life Log", size: "240", bgcolor:"#ececfc"}
+
+[CONFIG]
+*ID             {label: "   INT NOT NULL UNIQUE GENERATED BY DEFAULT AS IDENTITY"}
+NAME            {label: "   VARCHAR(16)  UNIQUE"}
+VALUE           {label: "   VARCHAR(28)"}
+DESCRIPTION     {label: "   VARCHAR(128)"}
+
+[AUTH]
+*ALIAS {label: "    VARCHAR (20) PRIMARY KEY"}
+PASSW  {label: "    TEXT"}
+EMAIL  {label: "    VARCHAR (44)"}
+ACTION {label: "    INT"}
+
+
+[LOG] {bgcolor: "gold"}  
+*ID    {label: "    INT UNIQUE GENERATED ALWAYS AS IDENTITY" }
+ID_CAT {label: "    INT NOT NULL"}
+ID_RTF {label: "    INT DEFAULT 0"}
+DATE   {label: "    TIMESTAMP NOT NULL"}
+LOG    {label: "    VARCHAR (128) NOT NULL"}
+AMOUNT {label: "    INT"}
+AFLAG  {label: "    INT DEFAULT 0"}
+STICKY {label: "    BOOL DEFAULT FALSE"}
+
+[CAT] {bgcolor: "maroon"}  
+*ID {label: "   INT GENERATED BY DEFAULT AS IDENTITY"}
+NAME {label: "  VARCHAR (16)"}
+DESCRIPTION {label: "   VARCHAR (225)"}
+
+[NOTES]{bgcolor: "cyan"}
+*LID {label: "  INTEGER PRIMARY KEY NOT NULL"}
+DOC  {label: "  TEXT"}
+
+
+        
+
+
+# Each relationship must be between exactly two entities, which need not
+# be distinct. Each entity in the relationship has exactly one of four
+# possible cardinalities:
+#
+# Cardinality    Syntax
+# 0 or 1         0
+# exactly 1      1
+# 0 or more      *
+# 1 or more      +
+
+LOG *--1 CAT
+LOG *--0 NOTES
+
+LIFE_LOG_APPLICATION 1--1 CONFIG
+LIFE_LOG_APPLICATION 1--1 AUTH
+LIFE_LOG_APPLICATION 1--1 LOG
+Alias 1--1 Database
+
+