How to write fraction value using html?

degn · 07-23-2018, 07:02 PM

Hello forum

Im using the code &frasl; to generate a fraction with HTML in Calibre, its working fine in the preview mode (picture 2) but not the final EPUB-file. The code is (picture 1):

Code:

<p class="rightalm"><span style="font-size:70%;"><sup>7</sup>&frasl;<sub>3</sub></span> 1911.</p>

I get this error:

“This page contains the following errors: error on line 88 at column 69: Entity 'frasl' not defined Below is a rendering of the page up to the first error.” (picture 3)

Any idea what is wrong? and how to solve the problem so I can display the fraction symbol?

Regards Dan

DNSB · 07-23-2018, 08:10 PM

Quote:

Originally Posted by degn

Hello forum

Im using the code &frasl; to generate a fraction with HTML in Calibre, its working fine in the preview mode (picture 2) but not the final EPUB-file. The code is (picture 1):

Code:

<p class="rightalm"><span style="font-size:70%;"><sup>7</sup>&frasl;<sub>3</sub></span> 1911.</p>

I get this error:

“This page contains the following errors: error on line 88 at column 69: Entity 'frasl' not defined Below is a rendering of the page up to the first error.” (picture 3)

Any idea what is wrong? and how to solve the problem so I can display the fraction symbol?

Regards Dan

What happens when you replace &frasl; with "& # 8260;" <remove the spaces>? AFAIR, the calibre editor removes the DOCTYPE declaration which is needed to use named entities in epub2 documents. With epub3 removing most named entities, I've gotten used to using numeric entities instead though they are a PITA since named entities are just so much easier to read. I seem to remember from a discussion 4 or so years ago, that the calibre editor would translate named entities to numeric or the actual character while stripping the DOCTYPE declaration but as I said, years back and I may be misremembering.

Using Sigil as the editor, if I remove the DOCTYPE declaration, I get the following error from epubcheck:

Code:

Col: 69: FATAL(RSC-016): Fatal Error while parsing file 'The entity "frasl" was referenced, but not declared.'.

whereas when I restore the DOCTYPE declaration, I get "No problems found!".

Just in case, what I am referring to as the DOCTYPE declaration follows after the ?xml line.

Code:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
  "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

kovidgoyal · 07-23-2018, 09:08 PM

Unless you have turned off entity replacement in the editor settings, typing &frasl; in the editor will simply give you the ⁄ unicode character which will work everywhere. Or use the Fix HTML tool which will automatically replace the entities for you in all html files.

degn · 07-24-2018, 07:29 AM

Hi DNSB

replacing with & # 8260; worked fine, thanks.

07-23-2018, 07:02 PM	#1
degn Member Posts: 12 Karma: 10 Join Date: Jul 2018 Device: iBooks on iPad Pro	How to write fraction value using html? Hello forum Im using the code &frasl; to generate a fraction with HTML in Calibre, its working fine in the preview mode (picture 2) but not the final EPUB-file. The code is (picture 1): Code: <p class="rightalm"><span style="font-size:70%;"><sup>7</sup>&frasl;<sub>3</sub></span> 1911.</p> I get this error: “This page contains the following errors: error on line 88 at column 69: Entity 'frasl' not defined Below is a rendering of the page up to the first error.” (picture 3) Any idea what is wrong? and how to solve the problem so I can display the fraction symbol? Regards Dan Attached Thumbnails Last edited by degn; 07-23-2018 at 07:07 PM.

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07-23-2018, 09:08 PM	#3
kovidgoyal creator of calibre Posts: 44,006 Karma: 22669822 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Unless you have turned off entity replacement in the editor settings, typing &frasl; in the editor will simply give you the ⁄ unicode character which will work everywhere. Or use the Fix HTML tool which will automatically replace the entities for you in all html files.

07-24-2018, 07:29 AM	#4
degn Member Posts: 12 Karma: 10 Join Date: Jul 2018 Device: iBooks on iPad Pro	Hi DNSB replacing with & # 8260; worked fine, thanks.

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