Here is the reference mentioned today in our discussion on types of collections.
https://www.omg.org/spec/OCL/2.4/PDF. See sections 11.6 and following.
My summary of the definitions from the OCL reference.
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OCL
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Description
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collection
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an aggregation of elements. If an element occurs twice in a collection, there are two elements.
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set
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contains elements without duplicates.
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orderedset
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a set, the elements of which are ordered. It contains no duplicates.
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bag
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a collection with duplicates allowed.
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sequence
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a collection where the elements are ordered.
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My comparison between C++ and OCL terms.
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C++
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~OCL
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C++ Description
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container
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collection
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An object that stores other objects.
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unordered_map
unordered_set
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set
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an unordered associative container that supports unique keys (an unordered_set contains at most one of each key value) and in which the elements’ keys are the elements themselves.
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map
set
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orderedset
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an ordered associative container that supports unique keys (contains at most one of each key value) and provides for fast retrieval of the keys themselves.
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unordered_multimap
unordered_multiset
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bag
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an unordered associative container that supports equivalent keys (an instance of unordered_multiset may contain multiple copies of the same key value) and in which each element’s key is the element itself.
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multimap
multiset
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sequence
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an ordered associative container that supports equivalent keys (possibly contains multiple copies of the same key value) and provides for fast retrieval of the keys themselves.
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Thanks,
George