Fix issue when the domain is a logical construct

[jesper-friis]

Description

Type of change

• Bug fix and code cleanup
• New feature
• Documentation update
• Testing

Checklist for the reviewer

This checklist should be used as a help for the reviewer.

• Is the change limited to one issue?
• Does this PR close the issue?
• Is the code easy to read and understand?
• Do all new feature have an accompanying new test?
• Has the documentation been updated as necessary?
• Is the code properly tested?

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 85.44%. Comparing base (9f45048) to head (39a3919).

Files with missing lines	Patch %	Lines
tripper/datadoc/keywords.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #560      +/-   ##
==========================================
- Coverage   85.45%   85.44%   -0.02%     
==========================================
  Files          30       30              
  Lines        5027     5029       +2     
==========================================
+ Hits         4296     4297       +1     
- Misses        731      732       +1     

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