Weak associations are inferred associations between tables, similar to foreign keys, even if there is no foreign key explicitly defined in the database schema between the tables. Ruby on Rails table schemes are supported, as well as other simple naming conventions. Table name prefixes are automatically detected. Weak associations are output in the graphs as a dotted line, and are also output in the text formats.
You can use the -weakassociations=true or -weakassociations=false to control the display of weak associations on graphs and text output. You can also use the schemacrawler.format.show_weak_associations=true option in the schemacrawler.config.properties file to show weak associations.