Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/
g

Test String

Substitution

Processing...

Code Generator

Generated Code

# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression. sed -E 's/(?:(?!<(?:field|exclGroup)(?!\w)(?>"[\S\s]*?"|'[\S\s]*?'|(?:(?!\\/>)[^>])?)+>)[\S\s])*(?><(field|exclGroup)(?=(?:[^>"']|"[^"]*"|'[^']*')*?\sname\s*=\s*(?:(['"])([\S\s]*?)\2))\s+(?>"[\S\s]*?"|'[\S\s]*?'|(?:(?!\\/>)[^>])?)+>)(?:(?&core)|)<\\/\1\s*>(?:(?!<(?:field|exclGroup)(?!\w)(?>"[\S\s]*?"|'[\S\s]*?'|(?:(?!\\/>)[^>])?)+>)[\S\s])*(?(DEFINE)(?<core>(?>(?><([\w:]+)(?>"[\S\s]*?"|'[\S\s]*?'|(?:(?!\\/>)[^>])?)+>)(?:(?&core)|)<\\/\5\s*>|(?!<\\/[\w:]+\s*>)(?>[\S\s]))+))/VALUES (12345,"$3","\/Tx", "", "N", "Y"),\r\n/g;t' <<< "<field xmlns=\"http://www.xfa.org/schema/xfa-template/2.8/\" y=\"0in\" x=\"0.343mm\" w=\"8.881pt\" h=\"9.108pt\" name=\"detcon_recreation_only\"> <ui> <checkButton size=\"8.881pt\"> <border> <edge stroke=\"lowered\"/> <fill/> </border> </checkButton> </ui> <font size=\"0pt\" typeface=\"Adobe Pi Std\"/> <para vAlign=\"middle\"/> <value> <text>0</text> </value> <items> <text>1</text> <text>0</text> <text/> </items> </field> <field xmlns=\"http://www.xfa.org/schema/xfa-template/2.8/\" name=\"detcon_special_housing\" y=\"5.393mm\" w=\"27.94mm\" h=\"4.134mm\" x=\"0.343mm\"> <ui> <choiceList> <border> <edge stroke=\"lowered\"/> </border> <margin/> </choiceList> </ui> <font typeface=\"Arial Narrow\" size=\"6pt\"/> <margin topInset=\"0mm\" bottomInset=\"0mm\" leftInset=\"0mm\" rightInset=\"0mm\"/> <para vAlign=\"middle\"/> <value> <text>NA</text> </value> <items> <text>Not Applicable</text> <text>Hotel Component</text> </items> <items save=\"1\" presence=\"hidden\"> <text>NA</text> <text>HC</text> </items> </field> <exclGroup xmlns=\"http://www.xfa.org/schema/xfa-template/2.8/\" name=\"detcon_photo_taken\" x=\"0in\" y=\"0in\"> <?templateDesigner itemValuesSpecified 1?> <field w=\"12.446mm\" h=\"3.825mm\" name=\"lb_yes\"> <ui> <checkButton size=\"1.7639mm\" shape=\"round\"> <border> <?templateDesigner StyleID apcb1?> <edge/> <fill/> </border> </checkButton> </ui> <font typeface=\"Myriad Pro\"/> <margin leftInset=\"1mm\" rightInset=\"1mm\"/> <para vAlign=\"middle\"/> <caption placement=\"right\" reserve=\"7.698mm\"> <para vAlign=\"middle\" spaceAbove=\"0pt\" spaceBelow=\"0pt\" textIndent=\"0pt\" marginLeft=\"0pt\" marginRight=\"0pt\"/> <font size=\"8pt\" typeface=\"Arial Narrow\" baselineShift=\"0pt\"/> <value> <text>YES</text> </value> </caption> <value> <text xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:nil=\"true\"/> </value> <items> <text>1</text> </items> </field> <field w=\"28.702mm\" h=\"3.825mm\" name=\"lb_no\" x=\"13.233mm\"> <ui> <checkButton size=\"1.7639mm\" shape=\"round\"> <border> <?templateDesigner StyleID apcb1?> <edge/> <fill/> </border> </checkButton> </ui> <font typeface=\"Myriad Pro\"/> <margin leftInset=\"1mm\" rightInset=\"1mm\"/> <para vAlign=\"middle\"/> <caption placement=\"right\" reserve=\"23.954mm\"> <para vAlign=\"middle\" spaceAbove=\"0pt\" spaceBelow=\"0pt\" textIndent=\"0pt\" marginLeft=\"0pt\" marginRight=\"0pt\"/> <font size=\"8pt\" typeface=\"Arial Narrow\" baselineShift=\"0pt\"/> <value> <text>NO (see comments)</text> </value> </caption> <value> <text xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:nil=\"true\"/> </value> <items> <text>0</text> </items> </field> <border> <edge presence=\"hidden\"/> </border> <?templateDesigner expand 1?></exclGroup>"

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html