/* spec information about this property
name= content
css1= NA
css2= http://www.w3.org/TR/2008/REC-CSS2-20080411/generate.html#propdef-content
css21= http://www.w3.org/TR/2011/REC-CSS2-20110607/generate.html#propdef-content
css3= http://www.w3.org/TR/2012/WD-css3-ui-20120117/#content
other=
*/