Remove tag since it is semantically dubious and can easily be expre…

…ssed by an axis expression

lib/xpath/dsl.rb

@@ -45,10 +45,6 @@ def string
         Expression.new(:string_function, current)
       end
 
-      def tag(name)
-        Expression.new(:tag, name)
-      end
-
       def css(selector)
         Expression.new(:css, current, Literal.new(selector))
       end

lib/xpath/renderer.rb

@@ -158,10 +158,6 @@ def inverse(current)
       "not(#{current})"
     end
 
-    def tag(current)
-      "self::#{current}"
-    end
-
     def string_function(current)
       "string(#{current})"
     end

spec/xpath_spec.rb

@@ -103,14 +103,6 @@ def xpath(predicate=nil, &block)
     end
   end
 
-  describe '#tag' do
-    it "should filter elements by tag" do
-      @results = xpath { |x| x.descendant[x.tag(:p) | x.tag(:li)] }
-      @results[0].text.should == 'Blah'
-      @results[3].text.should == 'A list'
-    end
-  end
-
   describe '#contains' do
     it "should find nodes that contain the given string" do
       @results = xpath do |x|