LOYTEC L-VIS User Manual

L-VIS User Manual 300 LOYTEC
Version 6.2 LOYTEC electronics GmbH
A bracket expression is a list of characters enclosed by [ and ]. It matches any single
character in that list; if the first character of the list is the caret ^ then it matches any
character not in the list. For example, the regular expression [0123456789] matches
any single digit.
Within a bracket expression, a range expression consists of two characters separated by a
hyphen. It matches any single character that sorts between the two characters, inclusive,
using the locale's collating sequence and character set. For example, in the English locale,
[a-d] is equivalent to [abcd].
Most meta-characters lose their special meaning inside lists, but some characters must be
placed at specific positions, as pointed out below:
 To include a literal ] place it first in the list.
 To include a literal ^ place it anywhere but first.
 To include a literal - place it last.
The following special characters and symbols exist:
 The period . matches any single character.
 The symbol \w is a synonym for any alphanumeric character and \W is a
synonym for any non-alphanumeric character.
 The caret ^ and the dollar sign $ are meta-characters that respectively match the
empty string at the beginning and end of a line.
 The symbols \< and \> respectively match the empty string at the beginning and
end of a word.
 The symbol \b matches the empty string at the edge of a word, and \B matches
the empty string provided it's not at the edge of a word.
A regular expression may be followed by one of several repetition operators:
? The preceding item is optional and matched at most once.
* The preceding item will be matched zero or more times.
+ The preceding item will be matched one or more times.
Two regular expressions may be concatenated; the resulting regular expression matches
any string formed by concatenating two substrings that respectively match the concatenated
sub-expressions.
Two regular expressions may be joined by the infix operator |; the resulting regular
expression matches any string matching either sub-expression.
Repetition takes precedence over concatenation, which in turn takes precedence over
alternation. A whole sub-expression may be enclosed in parentheses to override these
precedence rules.
The back-reference \n, where n is a single digit, matches the substring previously matched
by the n
th
sub-expression enclosed in {}.

LOYTEC L-VIS Specifications

General

Brand	LOYTEC
Model	L-VIS
Category	Monitor
Language	English