CSS can be used with any structured document format, for example [XML]. In fact, XML depends more on style sheets than HTML since authors can make up their own elements which user agents don't know how to display.
For maximum flexibility, we recommend that authors specify external style sheets; they may be changed without modifying the source HTML document, and they may be shared among several documents.
For maximum flexibility, we recommend that authors specify external style sheets; they may be changed without modifying the source HTML document, and they may be shared among several documents.