Sync etl docs with problem-specifications

exercises/practice/etl/.docs/instructions.md

@@ -1,21 +1,8 @@
 # Instructions
 
-We are going to do the `Transform` step of an Extract-Transform-Load.
+Your task is to change the data format of letters and their point values in the game.
 
-## ETL
-
-Extract-Transform-Load (ETL) is a fancy way of saying, "We have some crufty, legacy data over in this system, and now we need it in this shiny new system over here, so
-we're going to migrate this."
-
-(Typically, this is followed by, "We're only going to need to run this
-once." That's then typically followed by much forehead slapping and
-moaning about how stupid we could possibly be.)
-
-## The goal
-
-We're going to extract some Scrabble scores from a legacy system.
-
-The old system stored a list of letters per score:
+Currently, letters are stored in groups based on their score, in a one-to-many mapping.
 
 - 1 point: "A", "E", "I", "O", "U", "L", "N", "R", "S", "T",
 - 2 points: "D", "G",
@@ -25,23 +12,16 @@ The old system stored a list of letters per score:
 - 8 points: "J", "X",
 - 10 points: "Q", "Z",
 
-The shiny new Scrabble system instead stores the score per letter, which
-makes it much faster and easier to calculate the score for a word. It
-also stores the letters in lower-case regardless of the case of the
-input letters:
+This needs to be changed to store each individual letter with its score in a one-to-one mapping.
 
 - "a" is worth 1 point.
 - "b" is worth 3 points.
 - "c" is worth 3 points.
 - "d" is worth 2 points.
-- Etc.
-
-Your mission, should you choose to accept it, is to transform the legacy data
-format to the shiny new format.
+- etc.
 
-## Notes
+As part of this change, the team has also decided to change the letters to be lower-case rather than upper-case.
 
-A final note about scoring, Scrabble is played around the world in a
-variety of languages, each with its own unique scoring table. For
-example, an "E" is scored at 2 in the Māori-language version of the
-game while being scored at 4 in the Hawaiian-language version.
+~~~~exercism/note
+If you want to look at how the data was previously structured and how it needs to change, take a look at the examples in the test suite.
+~~~~

exercises/practice/etl/.docs/introduction.md

@@ -0,0 +1,16 @@
+# Introduction
+
+You work for a company that makes an online multiplayer game called Lexiconia.
+
+To play the game, each player is given 13 letters, which they must rearrange to create words.
+Different letters have different point values, since it's easier to create words with some letters than others.
+
+The game was originally launched in English, but it is very popular, and now the company wants to expand to other languages as well.
+
+Different languages need to support different point values for letters.
+The point values are determined by how often letters are used, compared to other letters in that language.
+
+For example, the letter 'C' is quite common in English, and is only worth 3 points.
+But in Norwegian it's a very rare letter, and is worth 10 points.
+
+To make it easier to add new languages, your team needs to change the way letters and their point values are stored in the game.