Re: Use cases

Here's another use case, which I think is important.

An organization is using HTML5 as part of a sophisticated document
production workflow.  The final stage is to serve HTML documents over the
web to consumers. At this final stage, the documents are valid HTML5 (with
no extensions).  However, at earlier stages in the workflow the organization
wishes to add extensions to HTML5 in order to guide subsequent stages. The
organization could use XHTML or XML for this, but they would like to use the
HTML-syntax of HTML5 at the authoring stage because it is more acceptable to
their authors. In other words, the organization wants to invent its own tags
for internal use so that it can represent information in as straightforward
and direct a way as possible.

James