More typos and some emphasis added

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@90851 c90b9560-bf6c-de11-be94-00142212c4b1

reference/objaggregation/reference.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
  <reference id="ref.objaggregation">
   <title>Object Aggregation/Composition Functions</title>
   <titleabbrev>Object Aggregation</titleabbrev>
@@ -15,10 +15,11 @@
       hierachies and can function as a dynamic alternative to multiple
       inheritance. There are two ways to perform class (and/or object)
       composition depending on the relationship between the composed
-      elements: Association and Aggregation.
+      elements: <emphasis>Association</emphasis> and
+      <emphasis>Aggregation</emphasis>.
      </para>
      <para>
-      An Association is a composition of independently constructed and
+      An <emphasis>Association</emphasis> is a composition of independently constructed and
       externally visible parts.  When we associate classes or objects, each
       one keeps a reference to the ones it is associated with. When we
       associate classes statically, one class will contain a reference to an
@@ -58,7 +59,7 @@ $rep = new Report();
 ]]>
        </programlisting>
       </example>
-      We call also associate instances at runtime by passing a reference in a
+      We can also associate instances at runtime by passing a reference in a
       constructor (or any othe method), which allow us to dynamically change
       the association relationship between objects. We will modify the example 
       above to illustrate this point:
@@ -122,7 +123,8 @@ $output = $rep->generateReport();
       </example>
      </para>
      <para>
-      Aggregation, on the other hand, implies encapsulation (hidding) of the
+      <emphasis>Aggregation</emphasis>, on the other hand, implies 
+      encapsulation (hidding) of the
       parts of the composition. We can aggregate classes by using a (static)
       inner class (PHP does not yet support inner classes), in this case the
       aggregated class definition is not accessible, except through the class
@@ -401,7 +403,7 @@ method: save
       </informalexample>
      </para>
      <para>
-      One point that we have not mention above, is that the process of
+      One point that we have not mentioned above, is that the process of
       aggregation will not override existing properties or methods in the
       objects. For example, the class <classname>FileStorage</classname> defines a
       <varname>$data</varname> property, and the class