anchor.diff:  
   Going back to the commputation builder vs the pipeline method, another
   difference is the function that `parseShip` is passed to. The computation
  -expression only works array of ParaValue whereas like `collect`,
  +expression only works with arrays of ParaValue whereas like `collect`,
   the pipeline method operates on the values of Records, and can map
   singular values like ParaValue.String, etc.
   
  
positive.code: 
  ## Quickstart
  
  We're going to start with querying parsed data and as an example the data will
  represent a ship named bessie with 22 men onboard.
  
  *)
  
negative.code: The next step is extracting the information. There are many ways to accomplish
  this and each one will be demonstrated. Which one you choose will be personal
  preference. As the demonstrations become concise they introduce more advanced
  concepts, so initial examples will use simple constructs.
  
  `ParaValue` is a [discriminated union][du] and the first example queries it
  directly for more information.
  