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Branching and crossing of categorization threads
I've removed this section from COM:OVERCAT (I've copied it below). If there was discussion with a consensus to change OVERCAT to add this exception, then my apologies and please let me know. Otherwise, it is problematic. First, it's very difficult to understand. I'm a lawyer, I interpret dense legalese every day, yet I do not find this particularly clear. There must be a better way to describe this than referring to "a multifactorial net with multihierarchic traits". Second, I am not sure that I necessarily agree. Just to use the same example of the regional administrative office. It isn't a given that the file should be categorized directly in the subcat for the street as well as in the main parent category for the region. I would consider that COM:OVERCAT. The better solution would be to create a subcategory for regional government buildings or for the regional government. Anyway, hopefully we can sort this out. --Skeezix1000 (talk) 18:38, 7 July 2014 (UTC)
"Note that Commons category structure (as well as Wikipedia categorization) is not a simple hierarchy (like biological taxonomy) but rather a multifactorial net with multihierarchic traits. That's why one subject can be categorized into any category by one factor and into its parent category by another factor and such categorization should be not considered as overcategorization.
- Example: a category of the Regional Office is categorized to the category of the street where the office bulding is. As regards location, the building should be not categorized directly into the category of the city or the region. However, by attribution it should be categorized into the category of the region because the office is an administrative body of the region and the building is owned by the self-governed region. Such categorization is not overcategorization even though the second category is a parent category of the first category.
- Similarly, a category of a village which is part of a municipality can be categorized under the neighbouring village by cadastral division (because it fall under its cadastral area) and simultaneously directly to the category of the municipality (because both villages are co-equal municipal parts administratively).
Exceptionally, different categorization threads can even meet each other in the opposite direction (category A is subcategory of B by one factor and simultaneously category B is subcategory of A by another factor) and can create a quasi-cycle. However, such a solution is not preferred and should be avoided if possible."