anchor.diff:  
   |paddingChar |char |mandatory - default value = ' '
   
  -|length |int |mandatory = size of the fixed length record
  +|length |int |mandatory = size of the fixed length record (number of characters)
   
   |hasHeader |boolean |optional - Indicates that the record(s) of this type may
   be preceded by a single header record at the beginning of the file /
  
positive.code: 
  The FixedLengthRecord annotation is used to identified the root class of
  the model. It represents a record = a line of a file/message containing
  data fixed length formatted and can be linked to several children model
  classes. This format is a bit particular beause data of a field can be
  aligned to the right or to the left. +
   When the size of the data does not fill completely the length of the
  field, we can then add 'padd' characters.
  
negative.code: 
  |pattern |string |optional - default value = "" - will be used to format Decimal, Date,
  
  |length |int |optional - represents the length of the field (number of characters) for fixed length format
  
  |precision |int |optional - represents the precision to be used when the Decimal number
  will be formatted/parsed
  