add attribute to element from value of next element

[Anar Movsumov]

Hi community! Need your help. I have this code

<triggers>
  <request>
    <num>1</num>
    <lastname>xxx</lastname>
    <firstname>xxx</firstname>
    <middlename>xxx</middlename>
    <birthday>xxx</birthday>
    <birthplace>xxx</birthplace>
    <doctype>1</doctype>
    <docno>xxx</docno>
    <docdate>xxx</docdate>
    <docplace>xxx</docplace>
    <inn>xxx</inn>
    <pfno>xxx </pfno>
    <reason>xxx</reason>
    <reason_text>xxx </reason_text>
    <consent>xxx</consent>
    <consentdate>xxx</consentdate>
    <consentenddate>xxx</consentenddate>
    <admcode_inform>xxx</admcode_inform>
    <consent_owner>xxx </consent_owner>
    <contractno>xxx </contractno>
  </request>
......................... (many requests here)
</triggers>

and i want it to look like this

<triggers>
  <request num="1">
    <lastname>xxx</lastname>
    <firstname>xxx</firstname>
...
</request>

so <num>value</num> goes to <request num=“value”>

any help would be really really appreciated.

[Mark Olson]

@Anar-Movsumov
find/replace form; replace (?s)<request>\s*<num>(\d+)</num>(.*?</request>) with <request id="\1">\2.

The very excellent regex manual on the reference website has some pages that may be of interest:

• single character matches on \s, ., and \d
• capture groups and backreferences for why I wrapped (\d+) and (.+</request>) in parentheses
• search modifiers to understand how (?s) works
• multiplying operators on why you need to use .*? and not .* to match everything between the <num> element and the remaining children of the <request> tag.