Generate Graphviz input text to plot databases

Produces text input for Graphviz to make an HTML diagram of a given database.

Usage

# S3 method for class 'database'
gv(x, name = NA_character_, ...)

Arguments

x

a database, as returned by autoref or autodb.

name

a scalar character, giving the name of the database, if any. This name is used for the resulting graph, to allow for easier combining of graphs into a single diagram if required.

...

further arguments passed to or from other methods.

Value

A scalar character, containing text input for Graphviz.

Details

Each relation in the database is presented as a set of rows, one for each attribute in the relation. These rows include information about the attribute classes.

See also

The generic gv.