Generalizing Markup for Interlinear Text Presentation

Greetings,

HTML markup support for interlinear text is limited to Ruby annotation use
cases. Arguably Ruby is the most common and best understood interlinear
writing practice. There are other practices that have layout needs in
common with Ruby but then have their own additional presentation
requirements. While there may be many uses cases for interlinear text, I'm
personally only familiar with staffless chant notation (e.g. Znamenny,
Syric, Byzantine, Ethiopic, Hebrew, etc).

Could the W3C WG for HTML take on the bigger problem of tag support for
interlinear text layout?  Ruby might then be treated as a special case of
interlinear text and chant as another.  Both could apply a common base tag
set, then more specialized tags as needed.

I realize that this approach throws a wrench into established Ruby markup,
which could be grandfathered in and deprecated over time, or not.  My main
thrust here is to raise the need for broader interlinear text layout
support under HTML and make myself available to discuss requirements with
interested parties.

thank you,

-Daniel