This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.

OpenSSL::PKey::DSAError

        # OpenSSL::PKey::DSAError < OpenSSL::PKey::PKeyError

(from ruby core)
---
Generic exception that is raised if an operation on a DSA PKey fails
unexpectedly or in case an instantiation of an instance of DSA fails due
to non-conformant input data.
---

      

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.