Honeywell Rapid Eye, Administrator'S Manual

Page: 160 / 294

160
Configuring Other Hardware
Reference for Searching Rules and Regular Expressions
Table 8-7 lists the special characters available for use when making rules in the Rule box.
Technical users who know how to use a regular expression (RE) will benefit most from
using
Table 8-7 . Also, there are examples of extended data searches in the Rapid Eye™
Multi-Media Digital Video Recorder Remote View Operator Guide .
Table 8-7 Special Characters Available for a Search Rule
Character Name Searches for a Match of (…) Within the Rule
. Period Any one character.
Ex: .ire finds
wire
,
tire
,
4ire
, and so on.
[ ] Square brackets Each character in the brackets, in turn.
Ex: c[aou]t finds
cat
,
cot
or
cut
.
^ Caret Characters that are not in brackets.
Ex: r[^a] finds
rb
,
rc
,
rA
,
r1
and so on.
A rule at the beginning of a line.
Ex: ^Hume finds
Hume
at the start of lines.
A control code, when used with a backslash.
Ex: \^C finds the
control-C
control code.
$ Dollar sign A rule at the end of a line, when placed after it.
Ex: Kant$ finds only
Kant
at the end of lines.
- Dash A range of characters set in square brackets.
Ex: [a-z] matches any lower case letter.
+ Plus sign The character that it follows, once or more.
Ex: tu+ finds
tu
,
tuu
,
tuuu
, and so on.
* Asterisk The character that it follows, whether absent, occurring
once or more.
Ex: mo*e finds
me
,
moe
,
mooe
,
moooe
…
Ex: c[au]*t finds
ct
,
cat
,
caat
,
cut
,
cuut
…
? Question mark The character that follows the question mark, whether
absent or occurring once.
Ex: me?y matches either
mey
or
me
.
\ Backslash Special character, when placed before it.
Ex: \? Finds
?
.
Control character, when placed before it.
Ex: \b finds a backspace, \e an Esc (escape), \f a form
feed, \n a new line, \r a carriage return, \t a tab and \x0D
a hexadecimal encoded ASCII character.