@BeginModule
@NewPage
@Name      = Select
@Title     = Select fields
@Section   = Selection
@Class     = Selection
@Arguments = ifiles ofile
@Operators = select delete

@BeginDescription
This module selects some fields from @file{ifiles} and writes them to @file{ofile}.
@file{ifiles} is an unlimited number of input files. All input files need to have 
the same structure with the same variables on different timesteps.
The fields selected depends on the chosen operator and the parameters.
@EndDescription
@EndModule


@BeginOperator_select
@Title     = Select fields
@Parameter = keys

@BeginDescription
Selects all fields with keys in a user given list.
@EndDescription
@EndOperator


@BeginOperator_delete
@Title     = Delete fields
@Parameter = keys

@BeginDescription
Deletes all fields with keys in a user given list.
@EndDescription
@EndOperator

@BeginParameter
@Item = keys
STRING  Comma separated list of keys
@EndParameter
