<s>
RegexBuddy	B-Algorithm
is	O
a	O
regular	B-Language
expression	I-Language
programming	B-Application
tool	I-Application
by	O
Just	O
Great	O
Software	O
Co	O
.	O
Ltd	O
.	O
for	O
the	O
Microsoft	B-Application
Windows	I-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
It	O
provides	O
an	O
interface	O
for	O
building	O
,	O
testing	O
,	O
and	O
debugging	O
regular	B-Language
expressions	I-Language
,	O
in	O
addition	O
to	O
a	O
library	O
of	O
commonly	O
used	O
regular	B-Language
expressions	I-Language
,	O
an	O
interface	O
for	O
generating	O
code	O
to	O
use	O
regular	B-Language
expressions	I-Language
in	O
the	O
desired	O
programming	O
environment	O
,	O
a	O
graphical	O
grep	B-Application
tool	O
for	O
searching	O
through	O
files	O
and	O
directories	O
,	O
and	O
an	O
integrated	O
forum	O
for	O
seeking	O
and	O
providing	O
regular	B-Language
expression	I-Language
advice	O
with	O
other	O
RegexBuddy	B-Algorithm
users	O
.	O
</s>
<s>
RegexBuddy	B-Algorithm
's	O
regular	B-Language
expression	I-Language
engine	O
allows	O
the	O
software	O
to	O
emulate	O
the	O
rules	O
and	O
limitations	O
of	O
numerous	O
popular	O
regular	B-Language
expression	I-Language
flavors	O
.	O
</s>
<s>
15	O
regular	B-Language
expression	I-Language
flavors	O
are	O
supported	O
as	O
of	O
RegexBuddy	B-Algorithm
4.1.1	O
.	O
</s>
<s>
An	O
engine	O
developed	O
by	O
the	O
company	O
that	O
produces	O
RegexBuddy	B-Algorithm
.	O
</s>
<s>
The	O
System.Text.RegularExpressions.Regex	O
class	O
in	O
the	O
.NET	B-Application
Framework	I-Application
,	O
used	O
by	O
programming	O
languages	O
such	O
as	O
C#	B-Application
and	O
Visual	B-Language
Basic	I-Language
.NET	I-Language
.	O
</s>
<s>
The	O
regular	B-Language
expression	I-Language
flavor	O
of	O
the	O
package	O
,	O
available	O
in	O
the	O
JDK	B-Language
1.4	O
and	O
later	O
.	O
</s>
<s>
The	O
regular	B-Language
expression	I-Language
flavor	O
used	O
in	O
the	O
Perl	B-Language
programming	I-Language
language	I-Language
version	O
5.8	O
.	O
</s>
<s>
Version	O
10.36	O
of	O
Philip	O
Hazel	O
's	O
open	O
source	O
Perl	B-Language
Compatible	I-Language
Regular	I-Language
Expressions	I-Language
library	O
,	O
used	O
by	O
PHP/preg	O
and	O
REALbasic	B-Application
.	O
</s>
<s>
The	O
regular	B-Language
expression	I-Language
syntax	O
defined	O
in	O
the	O
third	O
edition	O
of	O
ECMA-262	B-Language
,	O
which	O
standardizes	O
JavaScript	O
.	O
</s>
<s>
The	O
regular	B-Language
expression	I-Language
flavor	O
supported	O
by	O
Python	B-Language
's	I-Language
built-in	O
re	O
module	O
.	O
</s>
<s>
The	O
regular	B-Language
expression	I-Language
flavor	O
built	O
into	O
the	O
programming	O
language	O
.	O
</s>
<s>
The	O
Tcl	B-Operating_System
Advanced	O
Regular	B-Language
Expressions	I-Language
flavor	O
.	O
</s>
<s>
POSIX	O
Basic	O
Regular	B-Language
Expressions	I-Language
,	O
defined	O
in	O
the	O
IEEE	O
POSIX	O
regular	B-Language
expression	I-Language
standard	O
.	O
</s>
<s>
POSIX	O
Extended	O
Regular	B-Language
Expressions	I-Language
,	O
defined	O
in	O
the	O
IEEE	O
POSIX	O
regular	B-Language
expression	I-Language
standard	O
.	O
</s>
<s>
The	O
POSIX	O
BRE	O
flavor	O
with	O
GNU	B-Operating_System
extensions	O
.	O
</s>
<s>
Used	O
by	O
the	O
GNU	B-Operating_System
implementations	O
of	O
traditional	O
UNIX	O
commands	O
like	O
grep	B-Application
,	O
sed	B-Application
,	O
and	O
awk	B-Application
.	O
</s>
<s>
The	O
POSIX	O
ERE	O
flavor	O
with	O
GNU	B-Operating_System
extensions	O
.	O
</s>
<s>
Used	O
by	O
the	O
GNU	B-Operating_System
implementations	O
of	O
traditional	O
UNIX	O
commands	O
like	O
grep	B-Application
,	O
sed	B-Application
,	O
and	O
awk	B-Application
.	O
</s>
<s>
The	O
regular	B-Language
expression	I-Language
flavor	O
defined	O
in	O
the	O
W3C	O
XML	O
Schema	O
standard	O
.	O
</s>
<s>
The	O
regular	B-Language
expression	I-Language
flavor	O
defined	O
in	O
the	O
W3C	O
XPath	B-Language
standard	O
;	O
used	O
in	O
XPath	B-Language
2.0	O
,	O
XSLT	O
2.0	O
and	O
XQuery	B-Language
1.0	O
.	O
</s>
<s>
RegexBuddy	B-Algorithm
allows	O
generating	O
code	O
for	O
a	O
further	O
extended	O
number	O
of	O
environments	O
,	O
based	O
on	O
the	O
above	O
flavors	O
.	O
</s>
