L.1.9.3 Ambiguous Characters

When classifying characters into one of the four slots defined above, it is likely that the classification of some characters is ambiguous (the resulting classification would be equally applicable for one or more font slots).

To handle this, the font face information can also include a hint, which specifies how ambiguous mappings are resolved into a font slot. This information is stored on the hint attribute on the rFonts element, and specifies the bucket into which these ambiguous characters fall.

For example, if the hint attribute has a value of eastAsia, then all ambiguous characters must be formatted using the East Asian font face.