}
// copy equivalent restrictions
exp = source.getEquivalentRestrictions();
if(exp.getExpressionType() == ILogicExpression.OR){
cls.addEquivalentClass(ont.createClass((ILogicExpression) convertResource(ont,exp)));
}else{
for(Object c: exp){
if(c instanceof IRestriction)
cls.addEquivalentRestriction((IRestriction)convertResource(ont,c));
else if(c instanceof IClass)