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the Bold font face. Finally, 600 is assigned to the next-heavier face, which is, of course, the Bold face.

font-weight is inherited, so if you set a paragraph to be bold, then all of its children will inherit that boldness, as we see in Figure 5-9. {font-weight: bold;}
Figure 5-9

Figure 5-9. Inherited font weight

This isn't unusual, but the situation gets interesting when youis said to be. There are a great many ways to label the heaviness offonts. For example, the font family known as Zurich has a number ofvariants such as Zurich Bold, Zurich Black, Zurich UltraBlack, ZurichLight, and Zurich Regular. Each of these uses the same basic font,but each has a different weight.

So let's say that you want to use Zurich for a document, butyou'd like to make use of all those different heaviness levels.You could refer to them directly through thefont-family property, but you really

XML enables interoperability

All of the advantages of XML outlined so far all make interoperability possible. This is one of the most important requirements for XML, to enable disparate systems to be able to share information easily.

By taking the lowest common denominator approach, by being web enabled, protocol independent, network independent, platform independent and extensible, XML makes it possible for new systems and old systems (that are all different) to communicate with each other. Encoding information in plain text with tags is better than using propietary and platform dependent binary formats.


Figure 8-38

Figure 8-38. Get as far to the left (or right) as possible

8.3.2. Applied Behavior

There are a number of interestingconsequences of the above rules, both because of what they say andwhat they don't say. The first thing to discuss is what happenswhen the floated element is taller than itsparent element.