regex101: PCRE (Legacy) Match Workspace

^start of line

Positive Lookahead(?=\s*<dd3:[^>]*>)

\s*any whitespace character, repeated any number of times

<dd3:the literal text <dd3: (case sensitive)

Negated Character Class[^>]*

*matches any number of characters outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

.*?any character (except for line terminators), repeated any number of times

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Group 1([^< ]+)

Negated Character Class[^< ]+

+matches at least one character outside the set below:

<the literal < (60₁₀ / 74₈ / 3C₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

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

Search reference

Regular Expression

^(?=\s*<dd3:[^>]*>).*?>([^< ]+)<

New

PUT /mg/co.xml HTTP/1.1
Host: 19.16.7.59
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:31.0) Gehko/20100101 Firefox/31.0

<?xml version="1.0" encoding="UTF-8"?>
<!-- THIS DATA SUBJECT TO DISCLAIMER(S) INCLUDED WITH THE PRODUCT OF ORIGIN. -->
<io:zzzz xmlns:io="http://kfj/ledm/iomgmt/2008/11/30" xmlns:dd="http://jkfhkj/dictionaries/1.0/" xmlns:dd3="http://jfja/dictionaries/2009/04/06" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jcjhjk/ledm/iomgmt/2008/11/30 ../../schemas/gfjbj.xsd">
    <io:aaaa>
        <dd3:bbbb>hjgjg</dd3:bbbb>
    </io:aaaa>
    <io:ccccc>
        <io:dddd>
            <dd3:ffff>15.34.2.5</dd3:ffff>
        </io:dddd>
        <io:eeee>
            <dd3:gggg>67</dd3:gggg>
        </io:eeee>
        <io:iiii>
            <dd3:jjjj><script>jgfjkgkj</script></dd3:jjjj>
        </io:iiii>
    </io:cccc>
</io:zzzz>