Where can I ask my question about classification schemas of human activities?

Question

My question Are there popular classification schemas of human activities? on Project Management Stack Exchange has been closed as off-topic. It is about classification of human activities into e.g. Paid/Unpaid, Learn/Apply, IT/Music/Exercise/Others. Is there any Stack Exchange where I can ask this question?

For reference, here is a copy of the original question:

I am trying to gain insights into how I spend my time professionally and personally. I plan to track a large portion of my activities using time tracking software and assign classes to each activity from multiple mutually independent classification schemas. The schemas are designed so that each activity falls into exactly one class of each schema.

E.g., currently I am considering these classification schemas (excerpt):

Area of life:

• Information technology
  • Software development
  • Others
• Music
  • Vocals
  • Guitar
  • ...
• Physical exercise
  • Weight training
  • Stretching
  • Cardio
• ...

Payment:

• Paid
• Unpaid

Skill stage (cannot find a better name for this):

• Learn
• Apply

Here are some example activities with their classes:

Activity	Area of life (Level 1)	Area of life (level 2)	Payment	Skill stage
Write software at my job	Information technology	Software development	Paid	Apply
Learn new framework at my job	Information technology	Software development	Paid	Learn
Watch guitar tutorial	Music	Guitar	Unpaid	Learn

By having multiple schemas I avoid the combinatorial explosion I would get with only one, and I retain more flexibility for reporting.

• Information technology
  • Software development
    • Paid
      • Learn
      • Apply
    • Unpaid
      • Learn
      • Apply
  • Others
    • Paid
      • Learn
      • Apply
    • ...
• ...

As usual, the devil is in the details, and thus it is not easy to come up with schemas that work for all of my activities. So I wonder whether there exist some widely used activity classification schemas like these, e.g. de facto standards from popular software, or maybe even official ones from standardization organizations. So far, I have only found some schemas in research papers, but it seems to me that these have been created ad hoc just for these papers:

General purpose:

• https://www.researchgate.net/figure/Classification-of-Activities_tbl1_220413119

• https://www.researchgate.net/figure/Examples-of-living-activity-classification_fig1_311621874

• https://www.researchgate.net/figure/2-Generic-Activity-Classification-used-in-CHASE_fig3_265251283

• https://www.researchgate.net/figure/Classification-of-Activities_tbl1_258957597

• https://www.researchgate.net/figure/Classification-of-Activities_tbl1_220413119

• https://www.researchgate.net/figure/Classification-of-activities_tbl1_265223072

• https://www.researchgate.net/figure/Taxonomy-of-activities-significant-for-the-older-adults-in-SH_tbl1_277918595

Marketing:

• https://www.researchgate.net/figure/Taxonomy-of-work-tasks-motivating-information-seeking_tbl1_262639795

Development of Food Technology:

• https://www.researchgate.net/figure/1-Classification-of-work-tasks_tbl1_323589978

Answer 1

Philosophy might be a good fit. It has a classification tag, however, I'd consider making the question more abstract first (and removing the noise related to the background of how you came up with it).

Parts of your question might be on-topic individually on some sites of the network. For instance, taxonomy of music-related activities might be on-topic on Music Fans. They too have a classification tag that seems to be applicable in your case.

But as with all advice to post on a specific site of the network, please, take the above with a grain of salt, read the Help Center articles on topicality of each (I linked the suggested ones), and ask on a per-site Meta in case of doubt before posting.