I'm interested in writing a Tcl package to aid in the generation of HTML that is accessible to users with disabilities. I'm already well-versed in writing accessible HTML, especially web-based forms, but
I'm unsure where to begin on the Tcl side of things:

'''Questions'''

   * I'd like this package to work well with the existing [HTML] package, what are some things to keep in mind when subclassing (if that's the proper term) a package in Tcl?
   * I'd like to generate the HTML through an XML interface, I'd prefer not to resort to [puts] except in cases where it's practical to do so.

'''Goals'''

   * Should work equally well in a CGI context and with Tcl-based web servers like [Tclhttpd].
   * Needs to take the drudgery out of writing accessible HTML, which is quite tedious due to the overhead imposed by the additional tagging.
   * A [perl] version is also required.
   * Should comply with existing accessibility recommendations, such as those at the [W3C].

- [WJR]