LdifModSpec addModSpec = LdifModSpec.createAdd( attributeDescription );
for ( LdifAttrValLine attrValLine : toAdd )
{
addModSpec.addAttrVal( attrValLine );
}
addModSpec.finish( LdifModSpecSepLine.create() );
LdifModSpec delModSpec = LdifModSpec.createDelete( attributeDescription );
for ( LdifAttrValLine attrValLine : toDel )
{
delModSpec.addAttrVal( attrValLine );
}