Target notation question

What is the correct target-id notation for a target in a jamfile in a 
specific directory ? Is it the same as the notation for a target in a 
specific project ?

Let us say I have a jamfile in the xxx/yyy relative directory from where 
I invoke b2, with a target in that jamfile called aaa. Is the correct 
notation for that target when invoking b2:

b2 /xxx/yyy//aaa

?

If not what is the correct target-id notation for the situation above ?

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