We need to add version.diff.uppercase_words credibility signal so that consumers can know the difference in terms of uppercase words between the current revision as compared to its parent revision.

The implementation will require making calls to utilities to populate the field values.

Steps:

• Step 1: First, need to update the version schema if not done already. [pls refer to documentation repo JSON schema/diff.json and delta.json]

{
  "identifier": 1063955750,
   .
   .
   "diff" : {
        "uppercase_words" : {
            "increase": 11,             
            "decrease": 2,
             "sum"      : 9,
             "proportional_increase" : 2,
              "proportional_decrease" : -2.3333         
              }
           }
}

• Step:2 Get the revision data with the two wikitexts (current rev and parent rev) in the articleupdate handler using revision utilitiy.

• Step:3 Get the word tokens in the two wikitexts using this utilitiy.

• Step:4 Get the uppercase words in the two wikitexts using this utilitiy.

• Step:5 Populate the required fields using utilities (increase, decrease, sum, proportional_increase, and proportional_decrease)