Template:cheatsheet-key: Difference between revisions

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===Key===
===Key===
Uses standard [http://en.wikipedia.org/wiki/Regular_expression#Basic_concepts quanitification] operators.
Based on Perl's [http://www.perl.com/doc/manual/html/pod/perlre.html standard quantifiers]:
;'''bold''': Must be present exactly once.
{| border="1" cellpadding="2"
;''italic''<nowiki>*</nowiki>: Match 0 or more times
| '''bold''' {1} || {{must}} be present exactly once
;+: Match 1 or more times
|-
;?: Match 1 or 0 times
| ''italic''<nowiki>*</nowiki> || {{optional}}, and {{may}} occur more than once
;[square brackets]: common list of values
|-
;(parentheses): data format
| + || {{must}} be present, and {{may}} occur more than once
|-
| ? || {{optional}}, but {{must-not}} occur more than once
|-
| [square brackets] || list of common values  
|-
| (parentheses) || data format  
|-
| # || comment
|-
| ! || awaiting documentation
|}

Latest revision as of 22:11, 20 December 2008

Key

Based on Perl's standard quantifiers:

bold {1} MUST be present exactly once
italic* OPTIONAL, and MAY occur more than once
+ MUST be present, and MAY occur more than once
? OPTIONAL, but MUST NOT occur more than once
[square brackets] list of common values
(parentheses) data format
# comment
! awaiting documentation