[1]
<http://www.re.be/css2xslfo/1_3_2/manual.pdf#page=23>:
[PRE(CSS example code)[
[[string-set]]: [[mark]] [[contents]];
]PRE]

[2] [CITE@en[CSS3 Generated and Replaced Content Module]]
( ([TIME[2003-05-15 21:54:58 +09:00]] 版))
<http://www.w3.org/TR/2003/WD-css3-content-20030514/#strings>