The erd package

[ Tags: database, development, program, public-domain ] [ Propose Tags ]

erd transforms a plain text description of a relational database schema to a graphical representation of that schema. It is intended that the graph make use of common conventions when depicting entity-relationship diagrams, including modeling the cardinality of relationships between entities.

A quick example that transforms an er file to a PDF:

$ curl 'https://raw.github.com/BurntSushi/erd/master/examples/simple.er' > simple.er
$ cat simple.er
# Entities are declared in '[' ... ']'. All attributes after the entity header
# up until the end of the file (or the next entity declaration) correspond
# to this entity.
[Person]
*name
height
weight
+birth_location_id

[Location]
*id
city
state
country

# 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      +
Person *--1 Location
$ erd -i simple.er -o simple.pdf

The PDF should now contain a graph that looks like this:

See the README.md file for more examples and instructions on how to write ER files.

Properties

Versions 0.1.0.0, 0.1.1.0, 0.1.2.0, 0.1.3.0
Dependencies base (==4.7.*), bytestring (==0.10.*), containers (==0.5.*), graphviz (==2999.*), parsec (==3.1.*), text (==1.*) [details]
License PublicDomain
Author Andrew Gallant
Maintainer jamslam@gmail.com
Category Database, Development
Home page https://github.com/BurntSushi/erd
Source repository head: git clone git://github.com/BurntSushi/erd.git
Uploaded Wed Aug 20 23:25:26 UTC 2014 by burntsushi
Distributions NixOS:0.1.3.0
Executables erd
Downloads 1365 total (46 in the last 30 days)
Rating (no votes yet) [estimated by rule of succession]
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Status Docs not available [build log]
Last success reported on 2015-05-19 [all 6 reports]
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