Information structure design: important issues

1. Straightforward notation of discrete mathematics is used

2. Some syntactic richness for data elements (strings, URL's, etc)

Baral96A : confpapers =
  {FIRSTAUTHOR  ~ Baral,
   OTHERAUTHORS ~ {Gabaldon, Provetti},
   TITLE ~ "Formalizing narratives using nested circumscription",
   CONFERENCE ~ CommonSense96,
   WEBPAGE ~ [http://www-formal.Stanford.EDU/tjc/96FCS/Final-Papers/alfredo@cs.utep.edu.ps],
   RESTOPICS ~ {filtering}}

How does one identify the URL corresponding to a particular symbol?