Allows orthogonal aural and visual views. Allows browsers to optionally implement both aural and visual views to produce truly multimodal documents. Given this current and future importance, it makes sense to influence presentation based on the structure of the document. This approach provides greatly improved document accessibility for visually disabled people without requiring compromises in the visual design of the document. This section extends the CSS1 specification to allow additional types of value.
Style sheets influence the presentation of documents by assigning values to style properties.
This section lists the defined style properties for aural presentation, and their corresponding list of possible values, expressed in CSS1 syntax. The list of CSS1 properties has been kept to a minimum, while making sure commonly used styles can be expressed. Depending on the formatting model and the presentation medium, some properties can prove hard to incorporate into existing UA implementations. E.g., a monaural browser is not able to fully honor spatial audio, but should approximate by mixing all the channels together. Other words are keywords that must appear literally, without quotes.