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  <mainDescription>&lt;p&gt;
    Refactoring is a disciplined way to restructure code&amp;nbsp;when small changes are made to&amp;nbsp;the code to improve its
    design.&amp;nbsp; An important aspect of a refactoring is that it improves the design while not changing the semantics
    of&amp;nbsp;the design; a refactoring neither adds nor removes functionality.
&lt;/p&gt;
&lt;p&gt;
    Refactoring enables you to evolve&amp;nbsp;the code slowly over time, to take an iterative and incremental approach to
    implementation.
&lt;/p&gt;
&lt;p&gt;
    These are the types of refactoring:
&lt;/p&gt;
&lt;ol&gt;
    &lt;li&gt;
        Code refactoring.&amp;nbsp; Often referred to simply as refactoring, this is the refactoring of programming source
        code.&amp;nbsp; Examples of code refactorings include Rename Method, Encapsulate Field, Extract Class, Introduce
        Assertion, and Pushdown Method.
    &lt;/li&gt;
    &lt;li&gt;
        Database refactoring.&amp;nbsp; A database refactoring is a simple change to a database schema that improves its design
        while retaining both its behavioral and informational semantics.&amp;nbsp; Examples of database refactorings include
        Rename Column, Split Table, Move Method to Database, Replace LOB with Table, Introduce Column Constraint, and Use
        Official Data Source.
    &lt;/li&gt;
    &lt;li&gt;
        User interface (UI) refactoring.&amp;nbsp; A UI refactoring is a simple change to the UI which retains its
        semantics.&amp;nbsp; Examples of UI refactorings include Align Entry Fields, Apply Common Button Size, Apply Common
        Font, Indicate Format, Reword in Active Voice, and Increase Color Contrast.
    &lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;
    These are suggested resources:
&lt;/p&gt;
&lt;ul&gt;
    &lt;li&gt;
        &lt;a  href=&quot;http://www.refactoring.com&quot; target=&quot;_blank&quot; &gt;http://www.refactoring.com&lt;/a&gt;
    &lt;/li&gt;
    &lt;li&gt;
        &lt;a  href=&quot;http://www.agiledata.org/essays/databaseRefactoring.html&quot; &gt;http://www.agiledata.org/essays/databaseRefactoring.html&lt;/a&gt;
    &lt;/li&gt;
&lt;/ul&gt;</mainDescription>
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