[FIG(quote)[
[FIGCAPTION[
[1] [CITE@en[Apple News Format Reference: Metadata]]
([TIME[2016-06-29 11:14:50 +09:00]])
<https://developer.apple.com/library/ios/documentation/General/Conceptual/Apple_News_Format_Ref/Metadata.html#//apple_ref/doc/uid/TP40015408-CH3-SW1>
]FIGCAPTION]

> 
>   "thumbnailURL": "bundle://header.png",

]FIG]


[FIG(quote)[
[FIGCAPTION[
[2] [CITE@en[Apple News Format Reference: Properties]]
([TIME[2016-06-29 11:15:31 +09:00]])
<https://developer.apple.com/library/ios/documentation/General/Conceptual/Apple_News_Format_Ref/Properties.html#//apple_ref/doc/uid/TP40015408-CH2-SW1>
]FIGCAPTION]

> 
>     {
>       "role": "photo",
>       "URL": "bundle://image.jpg"
>     }

]FIG]


[FIG(quote)[
[FIGCAPTION[
[3] [CITE@en[Apple News Format Reference: Audio]]
([TIME[2016-06-29 11:16:49 +09:00]])
<https://developer.apple.com/library/ios/documentation/General/Conceptual/Apple_News_Format_Ref/Audio.html#//apple_ref/doc/uid/TP40015408-CH6-SW1>
]FIGCAPTION]

> A percent-encoded URL to an image that represents the audio file, such as a cover image. Supported image types include JPEG (.jpg or .jpeg), PNG, and GIF.
> Image URLs can begin with http://, https://, or bundle://. If the image URL begins with bundle://, the referenced image file must be in the same directory as the document.

]FIG]