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font warning in epub validator

Explorer ,
May 28, 2020

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Can someone help interpret this validator warning:

"INFO(CSS-007): ./books/Bo/databases/eBookIt/temp_uploads/1590631189.epub/OEBPS/Styles/idGeneratedStyles.css(36,2): Font-face reference OEBPS/Fonts/Antonio-Bold.ttf refers to non-standard font type application/x-font-ttf."

My first guess was maybe it was a font conflict or incompatibility issue, but the same font and css is used throughout the other chapters and they exported fine (no warning messages) so I'm wondering what's going on. The only thing that's different is that this chapter contains a table whose borders I set to 0 in Sigil, but that would be unrelated, right?

 

Thanks,

Carl

Adobe Community Professional
Correct answer by Laubender | Adobe Community Professional

Hi Carl,

suffix *.ttf of your used font file points to a TrueType font. That's against EPUB 3 specifications:

 

"EPUB 3 requires Reading Systems to support the OpenType and WOFF font formats for embedded fonts in conjunction with the CSS @font-face rules."

Source:

http://idpf.org/epub/30/spec/epub30-changes.html#sec-new-changed-embedded-fonts

 

Regards,
Uwe Laubender

( ACP )

TOPICS
EPUB, How to, Import and export

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font warning in epub validator

Explorer ,
May 28, 2020

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Can someone help interpret this validator warning:

"INFO(CSS-007): ./books/Bo/databases/eBookIt/temp_uploads/1590631189.epub/OEBPS/Styles/idGeneratedStyles.css(36,2): Font-face reference OEBPS/Fonts/Antonio-Bold.ttf refers to non-standard font type application/x-font-ttf."

My first guess was maybe it was a font conflict or incompatibility issue, but the same font and css is used throughout the other chapters and they exported fine (no warning messages) so I'm wondering what's going on. The only thing that's different is that this chapter contains a table whose borders I set to 0 in Sigil, but that would be unrelated, right?

 

Thanks,

Carl

Adobe Community Professional
Correct answer by Laubender | Adobe Community Professional

Hi Carl,

suffix *.ttf of your used font file points to a TrueType font. That's against EPUB 3 specifications:

 

"EPUB 3 requires Reading Systems to support the OpenType and WOFF font formats for embedded fonts in conjunction with the CSS @font-face rules."

Source:

http://idpf.org/epub/30/spec/epub30-changes.html#sec-new-changed-embedded-fonts

 

Regards,
Uwe Laubender

( ACP )

TOPICS
EPUB, How to, Import and export

Views

348

Likes

Translate

Translate

Report

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Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
May 28, 2020 0
Adobe Community Professional ,
May 28, 2020

Copy link to clipboard

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Hi Carl,

suffix *.ttf of your used font file points to a TrueType font. That's against EPUB 3 specifications:

 

"EPUB 3 requires Reading Systems to support the OpenType and WOFF font formats for embedded fonts in conjunction with the CSS @font-face rules."

Source:

http://idpf.org/epub/30/spec/epub30-changes.html#sec-new-changed-embedded-fonts

 

Regards,
Uwe Laubender

( ACP )

Likes

Translate

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