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Index: U

U element: 4.1.6. Text Decoration
if either height or width areset to auto for a replaced element, then the valuewill always evaluate to the intrinsic height or width of the element.Thus, if an image is 150 pixels wide, and itswidth property is set to the valueauto, then its width willevaluate to 150px , as shown in Figure 8-26:

IMG {display: block; width: auto;}
Figure 8-26

Figure 8-26. Replaced elements with auto width are rendered using their intrinsic size

UA (see user agent)
underlining: 4.1.6. Text Decoration
changing color of: 4.1.6.1. Weird decorations
removing from hyperlinks: 4.1.6. Text Decoration
turned off by browsers: 4.1.6.1. Weird decorations
Uniform Resource Identifier (URI): 3.5. CSS2 Units
Uniform Resource Locators (see URLs)
units: 11.1.3. Case 3: Putting a Magazine Article Online
(see also length units; CSS2 units)
for aural style sheets: 3.5. CSS2 Units
avoiding mixing: 11.1.3. Case 3: Putting a Magazine Article Online
color: 3.6. Summary
universal selector: 10.2.1.1. Universal selector
unordered lists: 7.7.1. Types of Lists
unvisited anchors: 2.4.1. Pseudo-Class Selectors
uppercase text: 4.1.5. Text Transformation
upright text: 5.4.1. Fonts with Style
URI (Uniform Resource Identifier): 3.5. CSS2 Units
URLs (Uniform Resource Locators): 3.4. URLs
HREF attribute and: 1.4.1.1. LINK attributes
referring to in style sheets: 3.4. URLs
specifying for images: 6.2.1. Background Images
user agent (UA): 2.2.2. Grouping Declarations
2.2.2. Grouping Declarations
(see also browsers)
users, selecting alternate style sheets: 1.4.1.2. Alternate style sheets


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By making the W3C the keeper of the XML standard, it ensures that no one vendor should be able to cause interoperability problems to occur between systems that use the open standard. This should be reassuring to most companies making an investment in this technology, by being vendor neutral, this solution proposes to keep even small companies out of reach of big companies choosing to change the standards on them. For example, if a big company chooses to change the platform at its whim, then most other companies relying on that platform suffer. By keeping all data in XML and using XML in communications protocols, companies can maximize the lifetime of their investment in their products and solutions.

XML is language independent

By being language independent, XML bypasses the requirement to have a standard binary encoding or storage format. Language independence also fosters immense interoperability amongst heterogeneous systems. It is also good for future compatilbilty. For example, if in the future a product needs to be changed in order to deal with a new computing paradigm or network protocol, by keeping XML flowing through the system, addition of a new layer to deal with this change is feasible.

DOM and SAX are open, language-independent set of interfaces

</P></DIV>

As we can see from Figure 8-22, the paragraph hassimply been pulled upward by its negative top margin, such thatit's outside the parent DIV !

Figure 8-22

Figure 8-22. The effects of a negative top margin

With a negative bottom margin, though, it looks as though everythingfollowing the paragraph has been pulled upward. Compare the followingmarkup to the situation shown in Figure 8-23: