Regex to identify mismatch between source and target segment in sdlxliff?

Question

Hello, 
 just now I was struck with an error that happened while splitting/merging segments in a not too small sdlxliff (from an idml file). First of all: Good documentation in the SDL Knowledge base! ( https://gateway.sdl.com/apex/communityknowledge?articleName=000004305) 
 The problem was a mismatch between source and target segment. 
 Marking the relevant bits I scrolled through the file with Notepad++, found the offending segment and also found that once you apply Pretty Print to the sdlxliff file Strudio won't accept it anymore, so back to the backup file, fix the mismatch (once you know the numbers you don't need Pretty Print anymore), all fine, file works nicely now. 
 Phew. 
 Here's my question: Does anyone have a Regex that finds this kind of mismatch between source and target segment? It does take quite some time to find the broken part of the file... 
 Or is it too much for Regex and one would be better off with a proper parser? 
 
 Daniel

Paul · Answer

Hi 
 
I'm more interested in how this got like this. Can you tell me what happened to the files after they were split and before they were merged? Was it the split process that caused this in the first place? 
 
What did you do to correct the file?

Paul · Answer

Hi 
 
I think, that if the source equalled target then this could be possible with regex. But if the target has been translated, or changed in some way then I think regex may not be a good solution for this as you never know how many mrk elements there are and you'd need to be able to ignore the differences in translatable text. 
 
Maybe someone smarter than me with regex could find a way to do it, but I think it would require a small application built to find these issues.

Trados Studio > 5. Regex and XPath

Regex to identify mismatch between source and target segment in sdlxliff?