Using meta-data for foreign key?

I have an existing table in an app, along the lines of:

CREATE TABLE foo (
  name text,
  address text,
  some_numeric_info integer,
  <a bunch of additional fields here>
);

I now need to be able to associate additional information (e.g. printing
order) with each field.  Is it a bad idea to use the (fully qualified)
field name as a foreign key to link back to the table meta-data?  Is
there a better way?


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