& or & what should be used for & (ampersan

问题:

What is the difference between this & and this & for &(ampersand)? What should be use with utf8 ?

回答1:

Both are character references and refer to the same character (AMPERSAND, U+0026). & is a named or entity character reference and & is a numerical character reference.

In fact, & is actually just a substitution for & (see list of character entities):

<!ENTITY amp     CDATA "&#38;"   -- ampersand, U+0026 ISOnum -->

回答2:

http://www.xml.com/pub/a/2001/01/31/qanda.html

According to O'Reilly you should be using & in xml. UTF-8 is quite a bit different. http://www.fileformat.info/info/unicode/char/0026/index.htm

回答3:

No difference. Utf-8 doesn't matter because & is reserved anyway. So use &