Provides additional information about a style (typically named by the @style attribute), for example, a sub-style to distinguish between dots or sesamis, by declaring some to be “hollow” dots and some to be “solid” or filled dots.
For some styling, three pieces of style information are most useful: the style name or style class, the style type (human readable), and further specifics concerning the style, which is recorded in this @style-detail attribute.
Being able to indicate three separate styling-related specifications is particularly useful in Japanese, where authors typically use emphasizing marks (dots or sesamis), called “Kenten”, which are associated with individual Japanese characters as dots above, dots beside, or similar typographic construction. Many languages (Japanese, Korean, Thai, Chinese, Arabic, Hungarian, and Armenian, to name but a few) use stress marks and similar typographic conventions (such as dots or sesamis) in the same way that English (as one example) uses <bold> or <italic> emphasis.
Here are some Japanese examples concerning how the @style-detail attribute might be used to modify the style (@style-type):
Used on Elements: <styled-content>, <verse-group>, <verse-line>
|Text, numbers, or special characters||A value which indicates additional information about a style (@style), for example, a sub-style to distinguish between dots or sesamis, by declaring some to be “hollow” dots and some to be “solid” or filled dots.|
|Restriction||@style-detail is an optional attribute; there is no default.|
... <p><styled-content specific-use="emphasis" style-type="dot" style-detail="open" toggle="no">あいうえお</styled-content> ....</p> ...