X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=README.md;h=b39f8a718d7f1141e37456213cd716361a5a361a;hb=20bccb5369dd9394e47a92664339d405664274c7;hp=4d434405a8767742677f081bbc42b449058f889b;hpb=bf4fc3ed5a41cd1604ed74b8fb0b1e5261e517c5;p=erdiag.git diff --git a/README.md b/README.md index 4d43440..b39f8a7 100644 --- a/README.md +++ b/README.md @@ -5,8 +5,9 @@ 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. -*Note:* at the moment, only the conceptual graph is implemented, and no comments are allowed in textual descriptions. -At least the former is planned, and also probably a way to indicate relative identifiers. +*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. ----- @@ -35,6 +36,8 @@ Cardinality dictionary: * 1 = 1..1 * ? = 0..1 +Special cardinalities are also available to indicate relative identification: `?R` and `1R`. + To mark a weak entity, just surround its name by extra-brackets [[WeakEntity]]