Querying _nest_path_ while querying child

[Saurabh Sharma]

Hi All,

I am currently working on nested documents and not able to find a way to
query the _nest_path_ field.

There is no documentation about it.we can reach to children using

q={!parent which='-_nest_path_:* *:*'}

But is there any way using which we can reach deeper levels using
_nest_path_.

Suppose I do have a nested path
/req#/PD#0/A#1
How can I reach all the documents under PD?
q={!parent which='-_nest_path_:/req/PD/'} is not working for me.

Thanks
Saurabh Sharma