[FIG(quote)[
[FIGCAPTION[
[1] [CITE@en[Web Annotation Data Model]]
([TIME[2017-02-24 02:14:26 +09:00]])
<https://w3c.github.io/web-annotation/model/wd2/#dfn-class>
]FIGCAPTION]

> Class
> Resources may be divided, conceptually, into groups called "classes"; members of a class are known as Instances of the class. Resources are associated with a particular class through typing. Classes are identified by IRIs, i.e., they are also Web Resources themselves.

]FIG]


[FIG(quote)[
[FIGCAPTION[
[2] [CITE@en[Selectors and States]]
([TIME[2017-02-24 02:14:26 +09:00]])
<https://w3c.github.io/web-annotation/selector-note/#dfn-class>
]FIGCAPTION]

> Class
> Resources may be divided, conceptually, into groups called "classes"; members of a class are known as Instances of that class. Resources are associated with a particular class through typing. Classes are identified by IRIs, i.e., they are also Web Resources themselves.

]FIG]