Regular Expression to replace text inside tags in Notepad++

Question

Hivemind!

I am trying to edit Memsource *.mxliff files with Notepad++.
When I create a search task, both source and target lines mix up in a huge list.
But I need to make amendments only for lines inside <target>.../<target> tags.

For example:

1. <target>от 15 до 35 °C</target>
2. <target>Допустимый диапазон температур воздуха от -40 °C до +70 °C {1&gt;1)&lt;1}</target>  

Inside these lines I need to replace all instances of degrees with a non-breaking space version:

Find: (\d) °C
Replace with: $1 $2

What is the most optimal way to do so?
Any hints would be much appreciated. Thanks a lot!

Answer 1

• Ctrl+H
• Find what: (?:<target>|\G)(?:(?!target)[\s\S])*?\K(\d+)\s*(°C)(?=.*</target>)
• Replace with: $1 $2
• CHECK Match case
• CHECK Wrap around
• CHECK Regular expression
• UNCHECK . matches newline
• Replace all

Explanation:

(?:                         # non capture group
    <target>                # opening tag
  |                         # OR
    \G                      # restart from last match position
)                           # end group
(?:(?!target)[\s\S])*?      # 0 or more any character but not "target"
\K                          # forget all we have seen until this position
(\d+)                       # group 1, 1 or more digits
\s*                         # 0 or more spaces
(°C)                        # group 2
(?=.*</target>)             # must be followed by </target>

Replacement:

$1              # content of group 1 (i.e. the temperature)
           # non breaking space
$2              # content of group 2 (i.e. °C)

Screen capture (before):

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