To apply filters for Data Type do the following steps:

1. Create new Data Type at Administration mode | Data
   
2. Go to XSLT functions and add new function:
   
   "Settings" tab:
   - fill form
   
   "Input Parameters" tab:
   - Add new parameter “Filter”
   - “Parameter type” should be Expression<Func<XXX,Boolean>> (where XXX is the name of your type)
   - “Default value” should be <Your namespace>. <Data type name>.ActivePageReferenceFilter, FieldPredicatesFiler or other depending from type of your datatype
   - “Test value” could be <Your namespace>. <Data type name>.DataReferenceFilter and in Data Reference list should be selected some element (optional)
   
   "Function Calls" tab:
   - Add new function “<Your namespace>.Get<Data type name>Xml”
   - Click on “Filter”
   
   • “Parameter value type” should be “Execute a function call“
   • “Complex function call” should be “Composite | Utils | GetInputParameter” with parameter name Filter
     
     
3. At "Preview" tab you can see filtered data.