[concepts.lang.general]

# 18 Concepts library [[concepts]](./#concepts)

## 18.4 Language-related concepts [[concepts.lang]](concepts.lang#general)

### 18.4.1 General [concepts.lang.general]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/concepts.tex#L293)

Subclause [[concepts.lang]](concepts.lang "18.4 Language-related concepts") contains the definition of concepts corresponding to language
features[.](#1.sentence-1)

These concepts express relationships between types, type
classifications, and fundamental type properties[.](#1.sentence-2)
