Assertions:
  1. Opera 4-6.x (so far) only offers generalized support for BDO (only class/id/style/event attributes.) It does not have any element-specific behaviors.
  2. Netscape 6.0 only offered generalized support for BDO - it only supported class/id/style/events, but did not offer any element-specific behavior. The same thing could be said for any made-up element name. This changed in 6.1.
Plain BDO element:

filler text Plain BDO element, no attributes filler text

Plain BDO element with DIR="rtl":

filler text Plain BDO element, no attributes filler text

BDO element with CLASS, ID, STYLE, TITLE:
filler text BLINK element, with class="test" (Gray color), id="test1" (green background), style ("word-spacing: 20px"), and title ("this is a title" on hover) attributes filler text