anchor.diff:  
   (**
   
  -  ## Summary
  +## Summary
   
  -  This article demonstrated the `BsonProvider` type. The provider infers
  -  the structure of a `.bson` file and exposes it to F# programmers in a
  -  nicely typed way.
  +This article demonstrated the `BsonProvider` type. The provider infers
  +the structure of a `.bson` file and exposes it to F# programmers in a
  +nicely typed way.
   
   *)
  
positive.code: 
  (**
  
    The generated type has multiple properties:
      - `Id` of type `string`, corresponding to the `_id` field
      - `City` of type `string`, corresponding to the `city` field
      - `Loc` of type `float[]`, corresponding to the `loc` field
      - `Pop` of type `int`, corresponding to the `pop` field
      - `State` of type `string`, corresponding to the `state` field
      - `BsonValue` of type `BsonValue`, corresponding to the underlying
        `BsonDocument`
  
    The provider successfully infers the type from the samples, and exposes
    the various fields as properties (using a PascalCase name to follow
    standard .NET naming conventions).
  
   *)
  
  (**
  
    ### Inferring a record type
  
    The fields need not be of a primitive type for the inference to work.
    In the case of a field containing an array of documents, a unifying type
    for the `BsonArray` is generated. If a certain property is missing from
    one document, but present in another, then it is inferred as optional.
  
   *)
  
  
negative.code: (**
  
  # BSON Type Provider
  
  This article demonstrates how to use the BSON type provider to access
  `.bson` files in a statically typed way.
  
  The BSON type provider provides statically typed access to `BsonDocument`s.
  It takes as input a sequence of sample documents (e.g. the output from the
  `mongodump` utility). The generated type can then be used to read files
  with the same structure. If the loaded file does not match the structure of
  the samples, then a runtime error may occur (e.g. when accessing a
  nonexistent field).
  
  ## Introducing the provider
  
  The type provider is located in the `FSharp.Data.Bson.dll` assembly.
  Assuming the assembly is located in the `../../../bin` directory, we can
  load it in F# Interactive as follows:
  
   *)
  
  