anchor.diff:  the environment variable name that will be injected by the executor† for job consumption. Refer to
   <<variable-injection>> for details on environment variable available at execution time.
   
  -|`mediaType`
  -|Required
  -2+|MUST be an array of strings that MUST indicate the IANA Media types that the job accepts.
  +|`mediaTypes`
  +|Optional
  +2+|MUST be an array of strings that MUST indicate the IANA Media types that the job accepts. If omitted, executor† will
  +not be able to perform validation.
   
   |`multiple`
   |Optional
  
positive.code:     "files": [ // <1>
          {
              "name": "INPUT_FILE", // <2>
              "mediaType": [ "image/x-hdf5-image" ], // <3>
              "multiple": false, // <4>
              "required": true // <5>
          },
  
negative.code: a|
  <1> Optional array containing elements defined by Files Elements sub-section.
  <2> Required string containing name used to inject data via environment variables.
  <3> Optional array containing a list of accepted Media types. Omission will disable executor† validation.
  <4> Optional boolean indicating whether this element represents multiple files (flat directory) vs one file (false).
  Default is `false`.
  <5> Optional boolean indicating whether job requires this particular file. Default is `true`.
  