I've created some alternative commands to \HCode or \Tg. The idea is to define semantic names for logical elements of the document, such as titles, authors, sections etc. It is possible to assign HTML elements and attributes to these logical elements. There are commands for inline and block level elements, which should eliminate the need for constructs like \ifvmode\IgnorePar\fi\EndP etc.

I think it will be best to show some concrete examples:

The \NewLogicalBlock creates a new logical element. The used tag is configured using \SetTag, the attributes are set using \SetBlockProperty. The blocks are inserted to the document using \InlineElementStart ... \InlineElementEnd or \BlockElementStart ... \BlockElementEnd pairs. The start commands take two parameters, first is the logical block name, the second can be local parameters which shouldn't be used for the given logical block globally.

The main idea behind this mechanism is to allow easy work with new HTML5 elements and attributes for WAI-ARIA or Schema.org properties. I hope that this should allow us to make somehow more clear configurations for basic document building blocks.