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CREATE TABLE persons (name CHAR(50) PRIMARY KEY, company char(50) refe
+rences companies.name);
CREATE TABLE companies (name CHAR(50) PRIMARY KEY, business char(50));

> cd db
> ls
...
business
> cat company:row/business
Maker of electric lawnmowers and dangerous toys

> cd companies/Blogtronic
> ls
...
> ls referers/persons/company
Fergal Daly
... other rows of persons who's company field references Blogtronic's 
+primary key