Add discussion when best to meet objective - by author or best by user agent

[philljenkins]

The Abstract explains that:

"This document is for people who make web content (web pages) and web applications. It gives advice on how to make content usable . . . "

but does not explain and rarely even mentions the role of user agents (browsers + assistive technology). If it is expected that authors (designers and developers of content and application) best meet all these "8 User Story objectives" and all the "8 Design Objectives" without relying on browser extenions or ATs (user agents), then that needs to be made explicit.

If however, and this is recommended, some spectrum or trade-off beetween authors and user agents (UA) is a good, better, or best approach in meeting (or partially meeting) the specific objective, then that needs to be made explicit. I would recommend leaning towards the latter and being explicit when trying to meet the specific objective and include considerations for the UA to be included. Perhaps it will be determined that authors have more responsibility of certains types of content and applications and UA's have more responsibilities on other types of content and applications. Examples would be helpful.

I need to understand the language used, including vocabulary, syntax, tense, and other aspects of language.

For example, the author would be responsibe for determing the initial choices of terms and levels of vocabulalry, but the UA would provide the hooks and mechanism to get to definitions or to adaptations of the terms (whole chucks of content) and alternative levels of the vocabulary (or whole chucks of content). Such as a simplified version of "Terms and conditions" aternative vs the legally binding versions of "terms and conditions".