[ 本帖最后由 fei.ge 于 2009-5-23 16:11 编辑 ]作者: shanxi 时间: 2009-5-22 20:23
Some characters are reserved in HTML and XHTML. For example, you cannot use the greater than or less than signs within your text because the browser could mistake them for markup.
HTML and XHTML processors must support the five special characters listed in the table below:
Character Entity Number Entity Name Description
" " " quotation mark
' ' ' (does not work in IE) apostrophe
& & & ampersand
< < < less-than
> > > greater-than
比如Attributes中规定：
By default, SGML requires that all attribute values be delimited using either double quotation marks (ASCII decimal 34) or single quotation marks (ASCII decimal 39). Single quote marks can be included within the attribute value when the value is delimited by double quote marks, and vice versa. Authors may also use numeric character references to represent double quotes (") and single quotes ('). For double quotes authors can also use the character entity reference ".