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Menu with fixed width.
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3 columns layout grid. All colums are fixed and centered.
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margin: 0px auto;
5.2.2. Getting Bolder
Ifyou set an element to have a weight of bolder,then the user agent first must determine whatfont-weight was inherited from the parent element.It then selects the lowest number which corresponds to a font weightdarker than what was inherited. If none is available, then the user
XML is totally extensible
By not predefining any tags in the XML Recommendation, the W3C allowed developers full control over customizing their data as they see fit. This makes XML very attractive to encoding data that already exists in legacy databases (by using database metadata, and other schema information). This extensibility of XML makes it such a great fit when trying to get different systems to work with each other.
XML supports shareable structure (using DTDs)
Since the structure of the XML document can be specified in DTDs they provide a simple way to make it easier to exchange XML documents that conform to a DTD. For example, if two software systems need to exchange information, then if both of the systems conform to one DTD, the two systems can process information from each other. DTDs are not as powerful as some kind of schema architecture for XML, they don't support typing, subclassing, or instantiation mechanisms that a schema architecture must have.
could appear in a horizontal line and far exceed the edges of thecontaining block. Instead, if a float would stick out of itscontaining block by appearing next to another one, it is floated downto a point below any previous floats, as illustrated by Figure 8-36 (where the floats start on the next line inorder to more clearly illustrate the principle at work here). Thisrule first appeared in CSS2, to correct its omission in CSS1.
Figure 8-36. If there isn't room, floats get pushed to a new line
8. A floating element must be placed as high aspossible.
fig. The rule would matchfig-tree, however.
10.2.3. More Pseudo-Classes and Pseudo-Elements
Even though that might seem likeit's more than enough, another area of expansion is in<P>The next paragraph.</P>
Figure 8-23. The effects of a negative bottom margin
What's really happening in Figure 8-23 is thatthe elements following the DIV are placedaccording to the location of the bottom of theDIV. As we can see, the end of theDIV is actually above the visual bottom of itschild paragraph. The next element after the DIV ispage. This potentially can be used to create running heads orfooters.inherit
The value is inherited from the parent element. See Chapter 10, "CSS2: A Look Ahead", for more details.
9.1.2. Side Offsets