Problem: embedding <math> in a <p> </p> element

[pfeifhns]

Hello,
I'm writing a math-book with SIGIL and I'm using mathml.
So far all is fine.
My problem:
if I embed a <math>-Tag in <p> and </p>, then I get an error when uploading my ebook to BoD. It says that it is not allowed to do this. Leaving out the <p> </p> tag returns the error that <p> </p> must be present. Any suggestions?

Sample code:
<p><math ><mstyle displaystyle="true"><mrow class="MJX-TeXAtom-ORD"><msub><mi>δ<!-- δ --></mi>

<mrow class="MJX-TeXAtom-ORD"><mi>i</mi>

<mi>j</mi></mrow></msub></mrow></mstyle></math>
</p>

I hope someone has a good idea.
Thanks,
Hans

[KevinH]

What is BoD? Do they follow the official epub 3.3 spec?

What does the latest EpubCheck say about this?

I guess you could try a div instead of a p since there are fewer restrictions on the contents of the div tag vs the p.

[KevinH]

According to the specification, the permitted content of a "p" tag is the set called "Phrasing Content".

Phrasing Content includes the "math" tag.

See https://developer.mozilla.org/en-US/...rasing_content

So whomever or whatever said a "p" tag can not include a "math" tag is simply wrong according to that spec.

Perhaps this is an extra requirement by BoD, but it is not a epub or html5/whatwg requirement.

[pfeifhns]

Thank you, KevinH, for your answer. BoD ist "book on Demand", a publisher for books and e-books.
Yes, <p> may contain <math>, that' what SIGIL allows.
There is only one thing I didn't try: previously, my ebook was epub-2, than I inserted mathml. Should create a epub-3 with Sigil and copy my html to this, then I'll have another try.
Thank's a lot,
Hans

[Doitsu]

Originally Posted by pfeifhns

Should create a epub-3 with Sigil and copy my html to this, then I'll have another try.

You could use KevinH's ePub3-itizer plugin for the epub3 conversion.
However, not many epub3 apps support MathML. You might have to convert the formulas to .svg images.

[KevinH]

Yes, convert to epub3 since mathml is technically only supported internally by the epub3/html5 standard..

And most recent epub3 e-readers do support mathml (calibre, thorium, ade 4.5, iBooks, Readium, BlueFire, etc) but some early epub3 e-readers and most if not all epub2 readers do not support mathml. If you are targeting these older e-readers with your epub, as Doitsu said, using svg images to replace your mathml (or png images) will allow your epub to reach a larger e-reader audience.

There is (or was?) a standalone formula viewer for LibreOffice that will allow screen shots and MathJax can be used to covert straight mathml to svg.

MathJax is what Sigil's Preview uses to inline convert mathml to svg so that Preview will support mathml.

[JSWolf]

Originally Posted by KevinH

What is BoD?

Translated page...

https://www-bod-fr.translate.goog/?_..._x_tr_pto=wapp

[JSWolf]

Originally Posted by pfeifhns

Thank you, KevinH, for your answer. BoD ist "book on Demand", a publisher for books and e-books.
Yes, <p> may contain <math>, that' what SIGIL allows.
There is only one thing I didn't try: previously, my ebook was epub-2, than I inserted mathml. Should create a epub-3 with Sigil and copy my html to this, then I'll have another try.
Thank's a lot,
Hans

If you convert your math to SVG per @Doitsu's suggestion, you can keep it as ePub 2 if you want.

[RbnJrg]

Originally Posted by KevinH

There is (or was?) a standalone formula viewer for LibreOffice that will allow screen shots and MathJax can be used to covert straight mathml to svg.

I use an Inkscape extension, WriteTeX, that one can download from:

https://writetex.tk/

That extension converts LaTeX formulas (that can be written with LibreOffice Math) into svg images. Also is neccesary to have installed Pdf2svg converter (in Linux generally is not neccesary because is already installed by default) and TexMaker or TexStudio (because the extension uses a LaTeX compiler -I use xelatex). Results are perfect!

[pfeifhns]

Erstmal Danke für die vielen Antworten auf mein Problem!!

Ich habe mittlerweile mein epub2 auf epub3 umgestellt ( neues epub3 erzeugt und den Inhalt dann kopiert ). Beim Hochladen bekomme ich nun den Fehler, dass nur "Flussbasiertes ePub 2.0.1" unterstützt wird. Das war's dann, alles für die Tonne!
Bleibt nur noch, dass ich meinen Anbieter definitiv wechsele.

[KevinH]

Translation of above post:

First of all, thank you for the many answers to my problem!!

I have now switched my epub2 to epub3 (created new epub3 and then copied the content). When uploading, I now get the error that only "flow-based ePub 2.0.1" is supported. That's it, all for the bin!

All that remains is that I will definitely change my provider.