RDF.uri/1 preserves empty fragments

CHANGELOG.md

@@ -19,6 +19,7 @@ This project adheres to [Semantic Versioning](http://semver.org/) and
 
 ### Fixed
 
+- `RDF.uri/1` preserves empty fragments
 - booleans weren't recognized as convertible literals on object positions
 - N-Triples and N-Quads decoder didn't handle escaping properly
 

lib/rdf.ex

@@ -105,7 +105,11 @@ defmodule RDF do
   def uri(string) do
     with parsed_uri = URI.parse(string) do
       if uri?(parsed_uri) do
-        parsed_uri
+        if is_binary(string) and String.ends_with?(string, "#") do
+          %URI{parsed_uri | fragment: ""}
+        else
+          parsed_uri
+        end
       else
         raise RDF.InvalidURIError, ~s(string "#{string}" is not a valid URI)
       end