Symbols and digits
''

Literal delimiter, 'attrib="value"' (alternative to “ ' ”).

#

[1] Reserved name indicator delimiter, prefixing REQUIRED, IMPLIED, FIXED and PCDATA, as in '#REQUIRED'. [2] Character separating a URL for an Internet-based document from a subdocument location, http:www.myserver.com/mydoc#chapter2. [3] Also part of character reference delimiter.

%

Parameter entity reference open delimiter, '%entity;'.

&

Entity reference open delimiter, '&entity;'.

&#

Character reference open delimiter, '{'.

'

Literal alternative delimiter, 'attrib='value'' (alternative to ' ” ').

(

Group open delimiter, '((a & b) | c)'.

)

Group close delimiter, '((a & b) | c)'.

*

[1] Optional and repeatable indicator, '(a*,b,c+)'. [2] In expressions, used ...

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