Asyou might expect, lighter works in just the sameway, except that it causes the user agent to move down the weight

SPAN {border: 1px dashed black; padding: 4pt;}

Figure 8-58. Inline padding and line-box layout

Note that this padding does not alter the actual shape of thecontent-height, and so will not affect the height of the inline boxfor this element. Adding borders to an inline element will not affectthe way line boxes are generated, as Figure 8-59illustrates.

Figure 8-59. Large inline boxes can overlap many other lines

All of the code that you write (in your Java classes) might be considered the Java application layer. Other layers are the XML Parser layer, the XML source (that supplies the XML data that is necessary), and the persistence engine (where the data is actually stored and retrieved by the source).

Your code (in the Java application layer) has to make use of the DOM or SAX API and the XML parser in order to access the information in XML documents (that come from your source). The source might be responsible for pulling data from different persistence engines (relational or object databases) and even the web (dynamically generated websites that supply only XML data).

In your application layer, you can create many interesting Java applications. The apps can run on the server side or client side or both. They may have graphical user interfaces or they may be web based. When I use the word application or app in this chapter, I don't exclude Java applets; I mean application (or app) in the broad sense of the word, i.e., I mean it to describe a software system written in Java that solves a real-world problem.