erd: An entity-relationship diagram generator from a plain text description.
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 is just below. The
original source file can be found amongst the examples in the repository.
$ 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.
|Versions [RSS]||0.1.0.0, 0.1.1.0, 0.1.2.0, 0.1.3.0, 0.2.0.0, 0.2.1.0|
|Dependencies||base (>=4.5 && <5), bytestring (>=0.10 && <0.11), containers (>=0.5.11.0), directory (>=184.108.40.206), filepath (>=1.4.2), gitrev (>=1.3.1), graphviz (>=2999.20 && <2999.21), parsec (>=3.1 && <3.2), raw-strings-qq (>=1.1), text (>=1 && <2), yaml (>=0.8.32) [details]|
|Source repo||head: git clone git://github.com/BurntSushi/erd.git|
|Uploaded||by mmzx at 2020-02-02T11:59:04Z|
|Downloads||6216 total (45 in the last 30 days)|
|Rating||(no votes yet) [estimated by Bayesian average]|
|Status||Docs not available [build log]
Last success reported on 2020-02-02 [all 3 reports]