switch (lu.getLexicalUnitType()) {
case LexicalUnit.SAC_INHERIT:
return ValueConstants.INHERIT_VALUE;
case LexicalUnit.SAC_URI:
return new URIValue(lu.getStringValue(),
resolveURI(engine.getCSSBaseURI(),
lu.getStringValue()));
case LexicalUnit.SAC_IDENT:
if (lu.getStringValue().equalsIgnoreCase