%STRUC Datafield structure overload
%
% [E,D] = STRUC(A)
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% INPUT
% A Datafile
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% OUTPUT
% E Structure conversion of datafile
% D Structure conversion of dataset filed of datafile
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% DESCRIPTION
% As the datafile object is a child of the dataset object the important
% information stored in the dataset field is not directly visible and
% accessible. This commands facilitates this, especially important to
% visualize the two structures by:
%
% STRUC(A)
%
% without output arguments: it lists the two structures.