HTML Beginner's Guide (5)

Addresses

tags are usually used to describe the author of the document, a method of contacting the author (e.g., an email address), and a revision date. It is generally the last part of a document.

For example , the last line of this online guide:

A Beginner's Guide to HTML / NCSA / pubs@ncsa.uiuc.edu / revised April 96

The result is:

A Beginner's Guide to HTML / NCSA / pubs@ncsa.uiuc.edu / revised April 96
Note:

is not used for ordinary postal addresses. For ordinary postal addresses, see "Forced Line Breaks" below.

Forced Line Breaks/ Postal Addresses

tag forces a line break with no gaps between lines. For text that consists of shorter lines, such as postal addresses, the additional blank line produced by the

element can feel unnecessary . For example, using
:

National Center for Supercomputing Applications

605 East Springfield Avenue

Champaign, Illinois 61820-5518


The output is:

National Center for Supercomputing Applications
605 East Springfield Avenue
Champaign, Illinois 61820-5518


Horizontal Rules

---

tag produces a horizontal line that is as wide as the browser window. Horizontal lines are useful for dividing parts of a document. For example, many people Add a horizontal line before their text ends and the

message begins.

You can change the size (thickness) and width (the horizontal line extends as a percentage of the window) of a line. You can try changing the settings until you get the right The display effect is satisfactory. For example:

---

is displayed as:


-------------------------- -------------------------------------------------- ----------


Character format
HTML has two styles for a single character or sentence: logical and physical. Logical styles mark up according to the content of the text, and physical Physical styles specify how a part of the display should be displayed. For example, in the previous sentence, the word "logical styles" is marked as a "definition." The same effect (in italics) can be achieved by using other markup to tell your browser to "put These words are italicized" to achieve this.

Note: Some browsers do not do any stylistic interpretation of the tag, so you may not find the words in the previous paragraph displayed in italics.

Logical Versus Physical Styles
If physical style and logical style can produce the same effect, why not become one?

In the ideal SGML concept, content and its display are separated. Therefore, SGML marks a first-level heading font as a first-level heading font, but does not specify how large the first-level heading font should be displayed. For example, 24-point bold Times centered. The benefits of this processing (similar to many style sheets in word processing software) is that if you decide to change the first-level mark font to 20-point left-justified Helvetica, you only need to change the definition of the first-level heading font in your browser. There are indeed many today The browser allows you to define how various HTML tags will appear on the screen as you wish.

Another advantage of logical tags is that they help maintain consistency throughout your document. The tag

is smaller than 24- point bold Times center or other descriptions are easier to remember. For example, for the tag. Most browsers interpret it in bold. However, some readers may prefer to have this part displayed in red. The logical style provides this flexibility.

Of course, assuming that if you want to display something in italics without being affected by the browser's settings, you need to use physical style. Therefore, physical style provides another kind of consistency: using certain text in your document Content displayed in one way will be displayed in the same way elsewhere.

You should always use a certain style. If you use physical style markup, use physical style throughout a document. If you use Logical style, stick to logical style in the document. Remember, future HTML may no longer support physical style, which means that browsers will not interpret physical style encoding.

The above is the HTML Beginner’s Guide (5) Content, please pay attention to the PHP Chinese website (www.php.cn) for more related content!