@@ -4001,6 +4001,8 @@ block][Extension: `yaml_metadata_block`]. Here is an example:
4001 text: doi:10.234234.234/33
4001 text: doi:10.234234.234/33
4002 publisher: My Press
4002 publisher: My Press
4003 rights: © 2007 John Smith, CC BY-NC
4003 rights: © 2007 John Smith, CC BY-NC
4006The following fields are recognized:
4008The following fields are recognized:
@@ -4066,6 +4068,16 @@ The following fields are recognized:
4066 ~ Either `ltr` or `rtl`. Specifies the `page-progression-direction`
4068 ~ Either `ltr` or `rtl`. Specifies the `page-progression-direction`
4067 attribute for the [`spine` element].
4069 attribute for the [`spine` element].
4072+ ~ iBooks-specific metadata, with the following fields:
4074+ - `version`: (string)
4075+ - `specified-fonts`: `true`|`false` (default `false`)
4076+ - `ipad-orientation-lock`: `portrait-only`|`landscape-only`
4077+ - `iphone-orientation-lock`: `portrait-only`|`landscape-only`
4078+ - `binding`: `true`|`false` (default `true`)
4079+ - `scroll-axis`: `vertical`|`horizontal`|`default`
4069[MARC relators]: http://loc.gov/marc/relators/relaterm.html
4081[MARC relators]: http://loc.gov/marc/relators/relaterm.html
4070[`spine` element]: http://idpf.org/epub/301/spec/epub-publications.html#sec-spine-elem
4082[`spine` element]: http://idpf.org/epub/301/spec/epub-publications.html#sec-spine-elem