Raw Metadata XML
<pkgmetadata>
<maintainer type="project">
<email>haskell@gentoo.org</email>
<name>Gentoo Haskell</name>
</maintainer>
<longdescription>
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:
<<http://burntsushi.net/stuff/erd-example-simple.png>>
See the <https://github.com/BurntSushi/erd#readme README.md> file for more
examples and instructions on how to write ER files.
</longdescription>
</pkgmetadata>