Reserved tags:
 - 552 - value for h1 tag
 - 553 - value for h2 tag. h1 and h2 are control tags in wwwisis for number of records to be processed in client/server environment
 - 554 - number of records to be displayed per page
 - 555 - display order (accend, descend)
// - 556 - output format (long, standard, short)
 - 557 - parameters file (cgi=@pf.cgi)
 - 558 - boolean value for bool tag
 - 559 - value for epilog. used with bool
 - 560 - value for prolog. used with bool
 - 561 - value for from tag
 - 563 - 570 - pathnames to databases e.g v563 = 'd:\inetpub\isis\data\cds'
 - 572 - 579 - contain true or nothing; true if relevant database is included in search condition
 - 581 - 589 - values for tag k1 in relevant database
 - 590 - 597 - values for different output format e.g. "print format type". It is used primarilly for BOOL thread because K1-Kn has its own - Kn.pft
// - 598 - 605 - database names (not implemented)
 - 606 - 613 - colors, one value for each database.
 
--- Session variables ---
 - "lang" - language to be used when user deal with the program
 - "key" - string constructed in conjuction with extracted keys from inverted file
 - "db" - name of databases to be processed (searched)
 - "tKeys" - contains user preferences made during walking in dictionary base
 - "cdb" - current database in use. Keep for newheader.asp purposes.
 - "sSnGMT" - string, contains the Session start time in ms.
 - "nSHits" - number, Search Hits
 - "nPHits" - number, Print Hits
 - "nDHits" - number, Dictionary Hits
 
--- Application variables ---
 - "aALDW" - stands for vbARRAY of ALL LANGUAGES DYNAMIC WORDS.
 	Variable with Application scope which contains all words of any languages to be displayed dynamically in pages.
 - "aOFTs" - stands for vbARRAY of OUTPUT FORMAT TYPES.
 	It is a given name for a table with rows 'db-name' and columns 'which oft'.
 - "aHFContent" - stands for vbARRAY for HELP FILES CONTENT.
 - "aALDC" - stands for vbARRAY of ALL DYNAMIC (site) CONTENT.
 - "aHFDescr" - stands for vbARRAY of HELP FILES DESCRIPTION.
 - "nHFiles" - an integer value; how many help files are defined.
 - "nSuppLang" - an integer value; how many languages are supported.
 
 Cookies:
 - in /global.asa file
 	- "nVisited" - how many times iLibrary was touched from this computer;
 	- "dVisited" - the date user have been in iLibrary for the last time;
 	(These both have expire time = 1 year)