[Deprecated] DMZ 1.5.3 (DataMapper OverZealous Edition)

[eluser]MeanStudios[/eluser]
Got a self reference question for someone. I'm a bit confused when it comes to the DMZ way of doing self references since there is no example, I thrive on examples haha. I have a table to keeps track of quotes that are sent out to clients. My client wants to keep track of revisions made to a quote so when it's sent again, all the changes are highlighted in red on the auto-generated pdf I'm creating from the data in the quote. What I'm trying to do is just keep all those revisions in the same table as the quote they are related. How would I set up my model to make this happen? Currently the fields I have in the quotes table are:
id,
client_id, <--- the client this quote is related to
date,
data, <--- Quote data serialized to fit into one field
type <--- Type of quote it is, there are currently two types, Client and Diary.

My current model is very simple:

Code:

class Quote extends DataMapper {

    var $table = 'quotes';
    var $model = 'quote';
    var $has_one = array('client', 'order');

    /**
     * Constructor
     *
     * Initialize DataMapper.
     */
    function Quote()
    {
        parent::DataMapper();
    }

    function data()
    {
        $q = new Quote();
        $q->where('id', $this->id)->get();
        
        return unserialize(stripslashes($q->data));
    }
}

Any help would be a hugely appreciated!