Apple WebObjects 3.5 - Manual (Page 94)

Chapter 6 Creating Reusable Components
94
Figure 27. A Navigational Control
The HTML code for one page might look like this:
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Thirteen lines of HTML code define the HTML table that constitutes the
navigational control. You could copy these lines into each of the application’s
pages or use a graphical HTML editor to assemble the table wherever you need
one. But as application size increases, these approaches becomes less practical.
And obviously, when a decision is made to replace the navigational table with an
active image, you must update this code in each page. Duplicating HTML code
across pages is a recipe for irritation and long hours of tedium.
With a reusable component, you could define the same page like this: