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     the class, which are present in the <var class="varname">$ws</var> object. Also
     absent is the constructor from <b class="classname">WDDXStorage</b>, which
     will not be logical to aggegate.
    </p>
    <p class="para">
     <div class="informalexample">
      <div class="example-contents">
<div class="cdata"><pre>
Let&#039;s aggregate $fs to the WDDXStorage class
$fs object
Class: filestorage
property: data (array)
   0 =&gt; 3.1415926535898
   1 =&gt; kludge != cruft
property: version = 1.0
method: filestorage
method: write
method: store
</pre></div>
      </div>

     </div>
    </p>
    <p class="para">
     The process of aggregation is cumulative, so when we aggregate
     <var class="varname">$fs</var> with the class <b class="classname">DBStorage</b>,
     generating an object that can use the storage methods of all the
     defined classes.
    </p>
    <p class="para">
     <div class="informalexample">
      <div class="example-contents">
<div class="cdata"><pre>
Now let us aggregate it to the DBStorage class
$fs object
Class: filestorage
property: data (array)
   0 =&gt; 3.1415926535898
   1 =&gt; kludge != cruft
property: version = 1.0
property: dbtype = mysql
method: filestorage
method: write
method: store
method: save
</pre></div>
      </div>

     </div>
    </p>
    <p class="para">
     Finally, the same way we aggregated properties and methods dynamically,
     we can also deaggregate them from the object. So, if we deaggregate the
     class <b class="classname">WDDXStorage</b> from <var class="varname">$fs</var>, we
     will obtain:
    </p>
    <p class="para">
     <div class="informalexample">
      <div class="example-contents">
<div class="cdata"><pre>
And deaggregate the WDDXStorage methods and properties
$fs object
Class: filestorage
property: data (array)
   0 =&gt; 3.1415926535898
   1 =&gt; kludge != cruft
property: dbtype = mysql
method: filestorage
method: write
method: save
</pre></div>
      </div>

     </div>
    </p>
    <p class="para">
     One point that we have not mentioned above, is that the process of
     aggregation will not override existing properties or methods in the
     objects. For example, the class <b class="classname">FileStorage</b> defines a
     <var class="varname">$data</var> property, and the class
     <b class="classname">WDDXStorage</b> also defines a similar property 
     which will not override the one in the object acquired during
     instantiation from the class <b class="classname">FileStorage</b>.
    </p>
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