Regular Expressions 101

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

Group 1([^ \t>]*)

Negated Character Class[^ \t>]*

*matches any number of characters outside the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

Group 2(\S+)

\S+any character that is not Unicode whitespace, repeated at least once

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

Non-Capturing Group(?:\1)

\1the text saved by group 1

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

<[ \t]*([^ \t>]*)[ \t]*>[ \t]*(\S+)[ \t]*<[ \t]*(?:\1)[ \t]*>

New

< datapt > 2 < datapt >
    < xunit > mass < xunit >
    < xval > 150.000245 < xval >
    < yunit > abs < yunit >
    < yval > 0.000000 < yval >