URL for the actual code, e.g., the ftp'able tar file descriptive title, suitable for title-derivative indexing <author> <version> <abstract> short description <description> URL for HTML file containing longer description <reference> URL for user manual or related paper <contact> name and/or email address of contact <keywords> keywords drawn from HPCC thesaurus <publication-date> (format is DD month YYYY) <environment> (languages, OS, hardware) <method> (methods, algorithms used) <application> (application areas) <comments> </urc>