X-Git-Url: https://git.auder.net/?p=erdiag.git;a=blobdiff_plain;f=README.md;h=83d1b909db3f30907f34bf8f17cb9705c82d809b;hp=2f543b96e5ff9a1221131b3c3311935666db549e;hb=01cb2ab3fccbc8e9fb6afd23db54c5e2613c24c5;hpb=3ca1e50c87c462e39ba19b5c7720715353315080

diff --git a/README.md b/README.md
index 2f543b9..83d1b90 100644
--- a/README.md
+++ b/README.md
@@ -5,10 +5,6 @@ Inspired by [this repository](https://code.google.com/archive/p/merisier/).
 This parser reads ER diagrams definition files, and produces two types of diagrams + SQL code.
 [Graphviz](https://www.graphviz.org/) is used on server side to translate parsed graph descriptions into SVG objects.
 
-*TODO list:* functional integrity constraints (CIF), inter-relations constraints (or, and, xor...), inheritance with the right symbol (triangle).
-
-*Note:* temporary dependency to [underscore](http://underscorejs.org/); good library but used so far only for its shuffle() method.
-
 -----
 
 An entity is defined as follow
@@ -38,6 +34,12 @@ Cardinality dictionary:
 
 Special cardinalities are also available to indicate relative identification: `?R` and `1R`.
 
+And, in case of a self-relationship, symbols '>' and '<' can indicate the sense, as in
+
+	{manage}
+	Users *>
+	Users 1<
+
 To mark a weak entity, just surround its name by extra-brackets
 
 	[[WeakEntity]]
@@ -54,8 +56,19 @@ To indicate an inheritance relation, proceed as follow
 	Animal Cat Fish
 	Planet Mars Venus
 
-Finally, blocks must be separated by new lines. For a usage example, see example.html (it should render as seen in example\_\*.svg)
+Finally, blocks must be separated by new lines. For a usage example, see example.html (it should render as seen in example\_\*.svg);
+or example2.html for a bigger, more realistic illustration (small social network).
 
 Note that the "drawMcd" method can take a second argument, which indicates the type of graph.
- * "bubble" draws the standard graph, as seen [here](https://en.wikipedia.org/wiki/Entity%E2%80%93relationship_model#/media/File:ER_Diagram_MMORPG.png) for example
+ * "bubble" draws the standard graph, as seen [here](https://en.wikipedia.org/wiki/Entity%E2%80%93relationship_model#/media/File:ER_Diagram_MMORPG.png)
  * "compact" (default) use the same box for an entity and its attributes
+
+-----
+
+**TODO** list:
+
+ - functional integrity constraints (CIF)
+ - inter-relations constraints (or, and, xor, inclusion)
+ - inheritance with the right symbol (triangle)
+
+*Implementation note:* temporary dependency to [underscore](http://underscorejs.org/); used only for its shuffle() method.