Regular Expressions

Channel Name Patters
Two types of channel name patterns are supported:

File 'globs': Simple to use
Regular expressions: More powerful.

File globs
These are '?' for a single character and '*' for zero or more arbitrary characters.
Regular Expressions
Regular Expressions are used by Emacs, Perl, Python and most UNIX tools (grep, vi, sed, awk, emacs,...).
Regular Expressions vs. glob pattens

Glob Reg.Exp.. Meaning

? . Any Single Character

* .* Zero or More Characters

More Regular Expressions

Reg.Expr. Meaning

^ Start

$ End

. any character

a? 'a' or no 'a'

a* zero or more 'a'

a+ one or more 'a'

.+ one or more arb. characters

a|b 'a' or 'b'

[0-9] '0' or '1' or ... or '9'

() grouping of subexpressions

Examples

Reg.Expr. Matches...

Temp Any Channel containing 'Temp'

Temp$ Any Channel ending in 'Temp'

^RFQHR Any Channel starting with 'RFQHR'

Tin_[0-9]+_sig$ Channels ending in 'Tin_<NUMBER>_sig'

^XYZSys_Temp[2-3]$ 'XYZSys_Temp2' or 'XYZSys_Temp3'

Pwr_(in)|(out) Channels containing 'Pwr_in' or 'Pwr_out'

Reg.Expr.	Meaning
^	Start
$	End
.	any character
a?	'a' or no 'a'
a*	zero or more 'a'
a+	one or more 'a'
.+	one or more arb. characters
a\|b	'a' or 'b'
[0-9]	'0' or '1' or ... or '9'
()	grouping of subexpressions

Reg.Expr.	Matches...
Temp	Any Channel containing 'Temp'
Temp$	Any Channel ending in 'Temp'
^RFQHR	Any Channel starting with 'RFQHR'
Tin_[0-9]+_sig$	Channels ending in 'Tin_<NUMBER>_sig'
^XYZSys_Temp[2-3]$	'XYZSys_Temp2' or 'XYZSys_Temp3'
Pwr_(in)\|(out)	Channels containing 'Pwr_in' or 'Pwr_out'