[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-relationship>
]FIGCAPTION]

> Relationship
> In the model sections, the term "Relationship" is used to distinguish those features that refer to other Resources, either by reference to the Resource's IRI or by including a description of the Resource in the Annotation's representation. The valid values for a Relationship are: a quoted string containing an IRI, an object that has the "id" property, or an array containing either of these if more than one is allowed.

]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-relationship>
]FIGCAPTION]

> Relationship
> In the model sections, the term "Relationship" is used to distinguish those features that refer to other Resources, either by reference to the Resource's IRI or by including a description of the Resource in the representation. The valid values for a Relationship are: a quoted string containing an IRI, an object that has the "id" property, or an array containing either of these if more than one is allowed.

]FIG]