The tag relationship-mapping already existed by the time I joined the site, with the very brief tag info of:
Determining the relationship between two people.
The user who created the tag is no longer active in the community.
Some prior discussion exists here:
On- and off-topic questions: kinship terms / relationship questions
Since then, this tag info has been added:
If you need to find the English-language term for the relationship between two members of a simple or complex family, the Steve Morse relationship calculator will help.
However, there have been some questions recently like If my aunt got married and had a child with her ex-husband, would that make my cousin's father's side of the family my family? where this tag has been used despite the relationship in question already being outlined in the question. So I am puzzled as to why this tag was applied here instead of the answer being closed as a duplicate of What is relationship of widower to late wife's family (i.e. in-laws)?. Why are any of the duplicates tagged with this tag?
The problematic questioners already know what the relationship is between the individuals in their questions -- the relationship doesn't need to be determined.
We have other legitimate questions that fit the scope of this site with this tag. Can we re-examine them and we envision what the ideal question for this tag might be?
Once we've done so, can we discuss what information should be in the tag info and tag wiki?
UPDATE: 30 Mar 2018
relationship-mapping has been burninated and replaced as proposed with two more specific tags, relationship-analysis and kinship-terminology.