The description of Category 2 is now available in HTML5. http://members.shaw.ca/peasthope/Category2.html Each diagram is present in SVG, PNG and JPEG forms. The earlier document in XML, DOCTYPE XHTML 1.1 plus MathML 2.0 plus SVG 1.1, remains available. http://members.shaw.ca/peasthope/Category2.xhtml Eventually I'll drop it. Almost any browser in contemporary use will open the JPEG. The PNG images are Base64 encoded inside the primary document. Some browsers can display a PNG but are baffled by the Base64 encoding or the inline access. Windows XP, IE displays these JPEG and PNG but not the SVG or the MathML. A contemporary Firefox or Iceweasel displays all. Feedback is welcome. Thanks again to Fred Linton for suggesting the category and for comments. Thanks to Vaughan Pratt for the original Web based document. Winter Greetings and Best Regards, ... Peter E. -- 123456789 123456789 123456789 123456789 123456789 123456789 123456789 12 Tel +1 360 639 0202 Bcc: peasthope at shaw.ca http://carnot.yi.org/ [For admin and other information see: http://www.mta.ca/~cat-dist/ ]