Database Design Article?

Hi All,

A few weeks ago I came across an article about changing how you use
physical and logical files.  I thought it was very interesting, but got
busy and never finished the article.  Not I cannot seem to find it
anywhere.

Essentially, the author was advocating using logical files with only the
fields the application is using.  This would enable you to add additional
fields to the physical file without the need to recompile every logical
and associated programs.

Did anyone else see (or write) this article?

Thanks!
JD