README.rdoc in to_xls-1.5.0 vs README.rdoc in to_xls-1.5.1

@@ -1,13 +1,15 @@
 = to_xls gem
 
-This gem transform an Array or Hash into a excel file using the spreadsheet gem.
+This gem transform an Enumeration (i.e. an Array) into an excel file using the spreadsheet gem.
 
+It is (very slightly) oriented towards exporting ActiveRecord sets, but it can be used outside of Rails as well.
+
 == Usage
 
   @users = User.all
 
-  @users.to_xls
+  @users.to_xls                        # by default, it exports using the "attributes" field on the first item of the collection
   @users.to_xls(:name => "Users")      # specifies the Sheet name (by default Sheet1)
   @users.to_xls(:headers => false)     # don't include headers
   @users.to_xls(:columns => [:name, :role]) # include only these columns, on this order
   @users.to_xls(:columns => [:name, {:company => [:name, :address]}]) # able to pick associations/called methods
   @users.to_xls(:columns => [:name, {:company => [:name, :address]}], :headers => ['Name', 'Company', 'Address']) # provide better names for the associated columns