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Container types
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Containers allow to manage collection of values of homogeneous type.
Three container types exist.

A container is a non-mutable structure once it has been locked.
Consequently just insert procedure are needed

Lists
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Correspond to an ordered collection of values belonging an elementary type.

At its creation


Sets
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Correspond to an unordered collection of values belonging an elementary type.


Dictionaries
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Dictionaries allow to associate a `key` to a `value`. Values can be retrieved through its associated key.
Values must belong an elementary type and keys must be *OBIStr_t*.