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opaque 

        # URI::Generic.opaque

(from ruby core)
---

Returns the opaque part of the URI.

    URI("mailto:foo@example.org").opaque #=> "foo@example.org"
    URI("http://foo/bar/baz").opaque     #=> nil

The portion of the path that does not make use of the slash '/'. The
path typically refers to an absolute path or an opaque part. (See
RFC2396 Section 3 and 5.2.)

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.