Asterisk Extension Matching Mechanism

The following informations at VoIP Wiki summarize Asterisk extension matching mechanism:

Extension Names and Patterns
http://www.voip-info.org/wiki/index.php?page=Asterisk+Dialplan+Patterns

Asterisk Extension Matching
http://www.voip-info.org/wiki/index.php?page=Asterisk+Extension+Matching

Sort Order of Extension Patterns
http://www.voip-info.org/wiki/index.php?page=Asterisk+config+extensions.conf+sorting