Unfortunately, current rendering environments do not offer this level of service, and it is beyond the style sheet mechanism to do so. Therefore, a prioritized list of alternative families can be supplied. This specification leaves the answer undefined for now. It allows the style sheet designer to specify only a single font and returns the best alternative based on objective visual qualities. Things only get better.
Users get the most out of the fonts they have installed on their system.
Users can control font clutter and still get reasonable results. The Weight category was added, and the Arm Style category was split off from the Stroke Variation category, bringing the number of classification categories to 9. Objective classification criteria were also added at this time. Transliteral Mapping could also be used to match between, say, decorative or script faces and text equivalents. It stores actual measurement data rather than bucketing it, which allows the matching system to use mathematical distance rather than penalty tables.