QA regex: How does the "Grouped search expression" function?

Question

Based on the best documentation I can found, I have prepared a very simple file to test this function. 
 German: Seite 1 -> English: Page 2 
 For this I have coded 2 regexes: 
 Source: Seite (\d+) 
 Target: Page (\d+) 
 I get the error message -> "Found in source but not in target" 
 Although the documentation mentions that a backreference should be used in the target, this would be Page \1, but this is not accepted in the regex editor. 
 What should be coded?

Paul · Accepted Answer

Yes, but only if you use the Grouped search expression option for QA.

Paul · Answer

Hi Anthony Rudd , 
 
It would be $1 and not \1. You'd only use \1 to reference a search result within the same expression. Studio uses .NET regex.

Nora Díaz · Answer

Hi Luca, 
 I tested your expression and it works for me. This is what the rule would look like, is that what you have? 
 
 I may be stating the obvious, but make sure to check the "Ignore case" box to make it case insensitive.

Trados Studio > 5. Regex and XPath

QA regex: How does the "Grouped search expression" function?