May 2006
Intermediate to advanced
104 pages
2h 50m
English
Content preview from HTML and XHTML Pocket Reference, 3rd Edition
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ASCII Character Set
HTML and XHTML documents use the standard 7-bit ASCII character
set in their source. The first 31 characters in ASCII (not listed) are
such device controls as backspace ( ) and carriage return ( ) and are not appropriate for use
in HTML documents.
HTML 4.01 defines only four entities in this character
range—less than (<, < ), greater than (<, > ), ampersand (&, & ), and quotation mark (", " )—that are necessary for escaping
characters that may be interpreted as markup. XHTML also includes the
' entity that is included
in every XML language. In XHTML documents, the ampersand symbol
(& ) must always be escaped in
attribute values. For better compatibility with XML parsers, authors
should use numerical character references instead of named character
references for all other character entities.
Numeric character entities may also be represented by their
hexadecimal equivalents. Hexadecimal values are preceded by an
x . For example, the hexadecimal
character reference for the less-than symbol is written <.
Decimal | Entity | Symbol | Description |
| Space | ||
| ! | Exclamation point | |
|
| " | Quotation mark |
| # | Octothorpe | |
| $ | Dollar symbol | |
| % | Percent symbol | |
|
| & | Ampersand |
|
| ' | Apostrophe (single quote) |
| ( | Left parenthesis | |
| ) | Right parenthesis | |
| * | Asterisk | |
| + | Plus sign | |
| , | Comma | |
| - | Hyphen | |
| . | Period | |
| / | Slash | |
| 0-9 | Digits 0-9 | |
| : | Colon | |
| ; | Semicolon | |
|
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.