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https://issues.apache.org/jira/browse/TIKA-650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13027481#comment-13027481
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Raimund Merkert commented on TIKA-650:
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I know, but it's a required attribute. So I would just make an empty attribute.
Personally, I can always work around this my having my own content handler
inject an alt attribute for img tags. But generally speaking, this sort of
behavior needs to be documented at the very least. I don't know if there are
any other tags where required attributes are not provided either.
> Missing required alt attribute on img tag
> -----------------------------------------
>
> Key: TIKA-650
> URL: https://issues.apache.org/jira/browse/TIKA-650
> Project: Tika
> Issue Type: Bug
> Components: parser
> Affects Versions: 0.9
> Reporter: Raimund Merkert
>
> I've written a content handler that prints out the xhtml tags for conversion
> from a word document with embedded images. For images, it does not generate
> the "alt" attribute for img tags, which causes validation to fail. alt is a
> required attribute in XHTML.
> Here's a partial output from [http://validator.w3.org/check]:
> {quote}
> Error Line 3, Column 1026: required attribute "alt" not specified
> ...meta><title> </title></head><body><p><img
> src="embedded:image63.jpg"></img></p>
> ✉
> The attribute given above is required for an element that you've used, but
> you have omitted it. For instance, in most HTML and XHTML document types the
> "type" attribute is required on the "script" element and the "alt" attribute
> is required for the "img" element.
> Typical values for type are type="text/css" for <style> and
> type="text/javascript" for <script>.
> {quote}
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