Syntax of lr:hierarchicalSubject tag?

[JeffK]

Newbie posting again here. I might have this completely wrong.

I have been experimenting with trying to put hierarchical keywords in to an images metadata keyword field.

I put in lr:hierarchicalSubject=A|B

I get literally lr:hierarchicalSubject=A as the parent and B as the child. What am I doing wrong here, or should am I doing something the app doesn't recognise at all.

Thank you, Jeff

[JeffK]

OK I partly sorted this. I don't need the tag. If I write A|B I get A|B but I also get the desired result ie A as parent and B as child. (A and B can represent metadata tags.)

[RobiWan]

Why you don't use categories panel?

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