Regular Expressions

Regular expressions are a powerful method of defining number ranges. They are used in several part of the system. Here some examples:

Regexp	Description	Matches	Not Matches
^05545$	Set start and end of string	05545	055453131
^05545	Matches anything starting with 05545	0554531 0554566	5545 055
05545$	Matches anything ending with 05545	998705545	055453
^055.*	Matches anything starting with 055	05545	99055
^0558*99	Matches anything starting with 055 and with zero or more 8 and ending by 99	05588899 05599 ||
^0557+	Matches anything starting with 055 and with one or more 7	05577 0557	055
^0558?987	Matches one or zero 8 inside the number	0558987 055987	0558999
05546)99	Matches either sequences	0554599 0554699	0554799
^055(45)*99	Matches zero or more instances of the sequences	055454599 0554599 05599	05544599
^0559{3}8	Matches a sequence of three 9	0559998	05599
^0559{2,3}8	Matches from two to three sequence of 9	055998 0559998	05599998
^055[1-9]	Matches any digits from 1 to 9	0551234	0550345	^1?800	Matches any number starting by 1 or not, ending with 800	1800, 800