Can urls contain dots in the path part?

Question

Is this a valid URL? (from a standard point of view)

http://test.com/some/path/version/1.2/thing 

Answer 1

Yes. This is common for versioning web service interfaces. See spec: http://www.w3.org/Addressing/URL/url-spec.txt

Answer 2

Obviously it is possible. Here is an example

http://static.springsource.org/spring/docs/3.0.x/reference/beans.html.