Harmonize ACSS and SABLE where appropriate, adding features missing in ACSS.
Adding pronunciation information, e.g. in SABLE
<pron sub="tomahto">tomato</pron>
In a style sheet this could be represented as:
"tomato" { pronounced: "tomahto" }
International Phonetic Alphabet is part of Unicode, but many text to speech engines don't support IPA.
Dates, times, phone numbers etc. could be handled via an enumeration perhaps together with additional parameters, e.g.
<span style="sayas: currency">$4000</span>
Selecting voice fonts by name, age and gender - some alternatives for doing this:
Standardize fall-back font names analogous to sans-serif, e.g. male, female, child, e.g.
voice-family: Mary, child
introduce speaker-age and speaker-gender properties for use in combination with voice-family, e.g.
voice-family: Eddie;
speaker-age: adult;
speaker-gender: male;
Duplicate CSS2's @font-face mechanism, enabling in principle the use of downloadable voice fonts