Codes are as follows:

 A/s   - A is a short article
 A/l   - A is a long article
 A/d   - A is a dictionary article
 A/p   - A is a propaedia reference
 A/pl  - A is a propaedia list reference
 A/toc - A is a table of contents reference
 A/r   - A is a reference without context [used for brevity]
 ...   - Indicates an abbreviation

Note: the propaedia list is a bookmark of links - arranged according to the structure
of the propaedia - to all 717 macropaedia or long articles. The link to this bookmark
is "Propaedia List" on the Britannica 97 home page.

Compound codes are of the form:

 A/*/B where:

   * = one of s, l, d, p, or pl
   A = a topic or article name
   B = a topic if A is an article
         or
       an article if A is a topic