How can I use Regex to identify a placeable?

Question

Hi, 
 I realise - too late - that in a huge file with alphanumeric strings recognised as placeables, that strings needing translation have incorrectly autopropagated without being translated. 
 For example: 
 ALFA-1-ANTITRIPSINA 
 PROTEINASA-3 
 (to name but a few). 
 I'd like to filter by 
 1. All segments containing a placeable (plus any other content). 
 2. All segments containing a placeable only. 
 Can anyone suggest a Regex string that would catch Studio placeables that I'd be able to use in the Advanced Display Filter and/or in QA checker>Regular expressions? 
 I've got as far as ([A-Z]|\d)(-|&ndash;|_|\.)([A-Z]|\d) but it's not specific enough (e.g., it also catches \d-\d). 
 Many thanks, 
 Emma

Paul · Accepted Answer

Last one I promise... Regex does this to me;-) 
 
\b(?=\S*[a-zA-Z])(?=\S*[0-9])\b([^\s.]*) 
 
That should ignore the full stops when you have one at the end of a sentence... think you mentioned that earlier too. 
 
Regards 
 
Paul

Paul · Answer

Hi Emma, 
 
How about this? 
 
\b(?=.*[a-zA-Z])(?=.*[0-9])\b 
 
Regards 
 
Paul

Trados Studio > 5. Regex and XPath

How can I use Regex to identify a placeable?