How to identify a sotapanna (stream enterer) I just wan to know whether there are any measurements advised by the Buddha to identify a stream enterer (sotapanna). I know for a fact that from the stream enterer and above, all four types have given up on self doesn't tell that he/she is enlightened or in this state or not. 

So how are we to find these noble people? Are there any instructions and where is it cited?
I have posted this book before, here it is again: Sotapanna Handbook (or available here).

It's a compilation of 50 or so suttas where Buddha mentioned stream-enterer (free from publisher).  

Yes, Buddha gave us tools to measure ourselves.  Please notice that there is no tool to measure other people's progress.  Only Buddha had that quality, not even his great disciples ever proclaimed progress in others. 

And for reference why one should not judge other's progress (stream-enterer, once returner, etc..) is from Migasala Sutta, Buddha told Ven. Ananda


  "I alone, Ānanda, can measure their measure or one like me."


The reason i feel it should be told because some teachers would proclaim their students to be such and such for some other questionable purpose. 

summary of migasala sutta


  Ananda visits Migasālā in her home and is questioned as to why both
  Pūrana and Isidatta, the former of whom was a brahmacārī and the
  latter not, should both have been born in Tusita, as sakadāgāmins.
  Ananda offers no explanation, but consults the Buddha, who declares
  that Migasālā is but a foolish, frail, motherly body with none but
  mother wit; how, then, could she understand the diversity in the
  person of man? (purisa-puggala-paropariyañāna). The Buddha then goes
  on to divide men into six classes according to their capabilities and
  attainments. It is not possible for anyone, save a Tathāgata, to
  measure persons.