An attributive possessive pronoun indicates the possessor of a possessive noun phrase. It can be signed with a 1-Handshape. This pronoun can precede the head noun.
[poss(B)3 novel] very interesting
'Her/his novel is very interesting.'
An attributive possessive pronoun can also follow the head noun.
father poss(d)3
'Her father'
[video example]
There are two other possessive pronouns: one has the Flat-Handshape:
poss(x)1 computer
'my computer'
The other has the V-Handshape with the base joint of middle finger flexed:
step_mother poss(d)3
'her stepmother'