[unord.general]

# 23 Containers library [[containers]](./#containers)

## 23.5 Unordered associative containers [[unord]](unord#general)

### 23.5.1 General [unord.general]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L13314)

The header [<unordered_map>](unord.map.syn#header:%3cunordered_map%3e "23.5.2 Header <unordered_­map> synopsis [unord.map.syn]") defines the class
templates unordered_map and unordered_multimap;
the header [<unordered_set>](unord.set.syn#header:%3cunordered_set%3e "23.5.5 Header <unordered_­set> synopsis [unord.set.syn]") defines the class
templates unordered_set and unordered_multiset[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L13320)

The exposition-only alias templates*iter-value-type*, *iter-key-type*,*iter-mapped-type*, *iter-to-alloc-type*,*range-key-type*, *range-mapped-type*,
and *range-to-alloc-type* defined in [[associative.general]](associative.general "23.4.1 General") may appear in deduction guides for unordered containers[.](#2.sentence-1)