anchor.diff:  -- transform data
   B = FOREACH A GENERATE name, TOTUPLE(url, picture) AS links;
   -- save the result to Elasticsearch
  -STORE B INTO 'radio/artists'<1> USING org.elasticsearch.pig.EsStorage(<2>);
  +STORE B INTO 'radio/artists'<1> USING org.elasticsearch.hadoop.pig.EsStorage(<2>);
   ----
   
   <1> {es} resource (index and type) associated with the given storage
  
positive.code: ----
  A = LOAD '/resources/media.json' USING PigStorage() AS (json:chararray<1>);"
  STORE B INTO 'my-collection/{media_type}'<2>
      USING org.elasticsearch.pig.EsStorage('es.input.json=true');
  ----
  
  <1> Schema declaration for the tuple. Since JSON input is used, the schema is simply a holder to the raw data
  
negative.code: ----
  A = LOAD '/resources/artists.json' USING PigStorage() AS (json:chararray<1>);"
  STORE B INTO 'radio/artists' 
      USING org.elasticsearch.hadoop.pig.EsStorage('es.input.json=true'<2>...);
  ----
  
  <1> Load the (JSON) data as a single field (`json`)
  