VariableDef-class: Class VariableDef
In jomuller/vartors: Transform Definition of Variables to R Scripts

The VariableDef class is used to store properly the definition of the variable.

varlabel: A length-one character vector. Should be with a max of 40 letters. All characters are allowed. Will be used to varlabel properly the plots and tables in output.
description: A length-one character vector. Description of the variable.
rname: A length-one character vector. Should be with a max of 16 letters. It's the name of the variable used in R. It could only use [a-z], [0-9] and "_" and must start with [a-z].
comment: A length-one character vector with a max of 1000 letters. It's a commentary that will appear when describing each variable and give some advices to the statistician to how to analyze this variable.
type: A length-one character vector. Must be one of the following : numeric, integer, factor, ordered, character, date or not_used. It's used to dispatch the script blocs regarding the type of the variable.
unit: A length-one character vector of max size 20. Should be the unit of a variable which will be showed in some graphs or the format of a date (by default %d/%m/%Y).
levels: A character vector. Only used if type is factor or ordered. Describe the levels used. The same levels must be in the database, otherwise NA will be generated.
labels: A character vector of the same size than levels or empty. If empty, the labels will be the levels.
originalname: A character vector representing the name of the variable in the original data table. Have no restriction.