Closed
Description
Take the following document:
= Test
This is an image <<commons-figure-asciidoc>>.
[[commons-figure-asciidoc]]
.Author
image::commons-figure-asciidoc.png[]
Once you generated the EPUB version, the image in package.opf as a valid id (here, the nane of the caption):
<item href="./images/commons-figure-asciidoc.png" id="item_commons-figure-asciidoc" media-type="image/png"/>
But when you set :data-uri: the id is invalid. Take the following doc:
= Test
:data-uri:
This is an image <<commons-figure-asciidoc>>.
[[commons-figure-asciidoc]]
.Author
image::commons-figure-asciidoc.png[]
Now, if you check the package.opf you can see the base64 format of the image. The id is set to the last characters of the base64 (here AyouyzE6v5n4AAAAAElFTkSuQmCC==).
<item href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAACMAAAAanCAIAA.../AyouyzE6v5n4AAAAAElFTkSuQmCC==" id="item_AyouyzE6v5n4AAAAAElFTkSuQmCC==" media-type=""/>
When you run EPUBCheck, you get the following error. The id attribute is not valid XML:
<message id="RSC-005" severity="error">RSC-005, ERROR, [Error while parsing file: value of attribute "id" is invalid; must be an XML name without colons], EPUB/package.opf (50-1127779)</message>
The generated id should be XML valid so we don't get this kind of messages