What might be self-explanatory to some is not explained well enough for me to appreciate. Especially with the overlap of passive voice and references to replicants and tags versus tag groups (and “these” what??? these tags? these tag groups? these replicants?).
Perhaps simpler …
Applying tags: When you apply a tag to an item, DevonThink creates a replicant of that item in the *Tags* section for the current database. Clicking on the replicant takes you to the item itself. Replicants(hyperlink) are discussed elsewhere in detail.
Deleting tags: When you delete a tag in the *Tags* section for the current database, the tag is removed from the database and from all items where it was attached. The replicants that were associated with tag are also removed from the database, but their referenced items remain otherwise untouched in the database.
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JJW