I've got a site coded in XHTML 1.0 Strict. I want to use the new Microdata to add breadcrumbs to my site (so Google will understand them).
My old non-microdata marked-up breadcrumbs look like this:
<ul>
<li>Level 1</li>
<li>Level 2</li>
<li>Level 3</li>
</ul>
According to Google, to markup breadcrumbs using Microdata, you extend the above code like this:
<ul>
<li itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="..." itemprop="url">
<span itemprop="title">Level 1</span>
</a>
</li>
...
</ul>
But this is not valid XHTML 1.0 Strict.
What should I do?
Should I ignore the validation conflicts?
Should I write itemscope="itemscope" instead of just itemscope (this would be valid XML, but still not valid XHTML)?
Should I change the Doctype to be HTML5 instead of XHTML 1.0 Strict?
I want this to work all the way back to IE6!
Please advice :)
Yes, if you wanted to use itemscope in XHTML, you would need to write itemscope="itemscope" and use XHTML5 (same DOCTYPE as HTML5, but XML syntax).
itemscope is not included in W3 HTML5, but present in WHATWG's version, so validation may continue to be a difficulty. There seems to be quite some political argument on this issue, which I haven't been following as it looks fairly tedious.
For the moment, if you want to use breadcrumb annotations in a finalised, validatable document format, you could use RDFa instead: the alternative (but older) proposal, which the argument is all about, and use the existing doctype:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
Since the major search engines have decided on schema.org last June (2011) as the way to do rich snippets, this question has become much more important seeing XHTML5 does not yet have a working DTD (BTW, http://www.html5dtd.org/ is working on a XHTML5 DTD and may well be ready when you read this, if so disregard what I'm about to say). And what I am about to say summarises a page I placed at http://www.nedprod.com/programs/portable/XHTMLwithHTML5microdata/ a few weeks ago, and there has more detail including a rich snippets demo if you want it.
I had need of extending XHTML 1.x Strict with schema.org/HTML5 microdata and getting it all to validate properly for updating nedprod, and Microsoft Expression Web has the occasional tendency to eat bits of HTML it edits, so validation is handy for catching when it borks. Hence I have created these DTDs which extend the standard XHTML 1.0 ones:
http://www.nedprod.com/xhtml1-strict-with-html5-microdata.dtd
http://www.nedprod.com/xhtml1-transitional-with-html5-microdata.dtd
To use, take a copy of your desired DTD (don't use the original from nedprod, I can't afford the bandwidth) and use as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict with HTML5 microdata//EN" "xhtml1-strict-with-html5-microdata.dtd">
or ...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional with HTML5 microdata//EN" "xhtml1-transitional-with-html5-microdata.dtd">
... or more likely, override the DTD used for validation by your particular XML validating setup.
BTW, here's something interesting, and I only include this as it's useful to know when answering the question. I honest to God thought that using the above doctypes would invoke quirks mode when rendering. Turns out, much to my great surprise, that IE8, Chrome 14, Firefox 5 and Opera 11.50 all render such a doctype in Standards mode. Who would have thought! So you could, if you wanted to, upload your XHTML pages onto the public internet with the custom doctype and the newer browsers at least would do the right thing.
Hope this helps someone,
Niall
Valid HTML 5 example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Example page</title>
</head>
<body>
<div itemscope="" itemtype="http://schema.org/MediaObject">
<div itemprop="video" itemscope="" itemtype="http://schema.org/VideoObject">
<meta itemprop="name" content="Breast Augmentation Video Diary">
<meta itemprop="duration" content="PT12M54S">
<meta itemprop="thumbnailUrl" content="http://www.plastic-surgery-estonia.com/new-assets/images/thumbnails/breast-augmentation.jpg">
<meta itemprop="contentURL" content="http://www.youtube.com/watch?v=BwPN6eCpxTk">
<meta itemprop="embedURL" content="http://www.youtube.com/watch?feature=player_embedded&v=BwPN6eCpxTk">
<meta itemprop="uploadDate" content="2010-11-09">
<iframe src="http://www.youtube.com/embed/BwPN6eCpxTk?rel=0&autohide=1&modestbranding=1&showinfo=0"></iframe>
<span itemprop="description">Video Diary</span>
</div>
</div>
</body>
</html>
Found these links helpful:
- http://support.google.com/webmasters/bin/answer.py?hl=en&answer=2413309&topic=1088474&ctx=topic
- http://www.reelseo.com/embedded-youtube-indexed-google/
Use the application/ld+json MIME type and a microdata generator to transform the markup into data:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>microdata.xhtml</title>
<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=utf-8"/>
</head>
<body>
<div>
<script type="application/ld+json">
{"items": [{
"type": ["https://schema.org/breadcrumb"],
"properties":{
"url": ["..."],
"title": ["Level 1"]
}
}]
}
</script>
</div>
</body>
</html>
or a data:uri in an object tag:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>microdata.xhtml</title>
<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=utf-8"/>
</head>
<body>
<div>
<object data="data:text/html;charset=utf-8;base64,PHVsPiA8bGkgaXRlbXNjb3BlIGl0ZW10eXBlPSJodHRwOi8vZGF0YS12b2NhYnVsYXJ5Lm9yZy9CcmVhZGNydW1iIj4gICAgICAgICA8YSBocmVmPSIuLi4iIGl0ZW1wcm9wPSJ1cmwiPiAgICAgICAgICAgPHNwYW4gaXRlbXByb3A9InRpdGxlIj5MZXZlbCAxPC9zcGFuPiAgICAgICAgIDwvYT4gICAgICAgICA8L2xpPiAgICAgICA8L3VsPg==">
<?microdata
<ul>
<li itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="..." itemprop="url">
<span itemprop="title">Level 1</span>
</a>
</li>
</ul>
?>
</object>
<!--[if lt IE 8]>
<object data="mhtml://#foo">
<?microdata
<ul>
<li itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="..." itemprop="url">
<span itemprop="title">Level 1</span>
</a>
</li>
</ul>
?>
<div id="foo">
PHVsPiA8bGkgaXRlbXNjb3BlIGl0ZW10eXBlPSJodHRwOi8vZGF0YS12b2NhYnVsYXJ5Lm9yZy9CcmVhZGNydW1iIj4gICAgICAgICA8YSBocmVmPSIuLi4iIGl0ZW1wcm9wPSJ1cmwiPiAgICAgICAgICAgPHNwYW4gaXRlbXByb3A9InRpdGxlIj5MZXZlbCAxPC9zcGFuPiAgICAgICAgIDwvYT4gICAgICAgICA8L2xpPiAgICAgICA8L3VsPg==
</div>
</object>
<![endif]-->
</div>
</body>
</html>
I want this to work all the way back to IE6!
Use the application/xhtml+xml XSLT shim to support IE6 and extend it to get a copy of the markup.
References
MDN: Base64 Encoding and Decoding
Images in a Web Page
MIME E-mail Encapsulation of Aggregate Documents, such as HTML (MHTML)
Mapping Microdata to RDF
data:URI Tests
Examining, implementing and testing of RFC2557 (MHTML)
MHTML URIs
HTML5: Differences from HTML4
try and validate some of google's pages...they don't validate.
validation is a tool, an awesome one, but nothing more, although i do applaud your determination. if you're that worried about validation i would switch to HTML5 .
Related
When I click on "Preview", the Google Structured Testing Tool don't show the image from my domain. But it shows the image of any other link, from Google images. Why?
<main itemscope itemtype="http://schema.org/NewsArticle">
<meta itemprop="mainEntityOfPage" content="https://isMyDomain.net/?p=one-page">
<span itemprop="author publisher" itemscope itemtype="https://pending.schema.org/NewsMediaOrganization">
<meta itemprop="url" content="https://isMyDomain.net">
<meta itemprop="name" content="siteName">
<link itemprop="sameAs" href="https://www.facebook.com/mypage" />
<link itemprop="sameAs" href="https://twitter.com/mypage" />
<link itemprop="sameAs" href="https://www.instagram.com/mypage" />
<span itemprop="logo" itemscope itemtype="https://schema.org/ImageObject">
<meta itemprop="url" content="https://isMyDomain.net/img/myLogo.png">
<meta itemprop="width" content="488">
<meta itemprop="height" content="60">
</span>
</span>
<span itemprop="image" itemscope itemtype="https://schema.org/ImageObject">
<meta itemprop="url" content="https://isMyDomain.net/img/posts/d40N.jpg">
<meta itemprop="width" content="634">
<meta itemprop="height" content="342">
</span>
<article>
<header>
<h1 itemprop="headline">Title</h1>
<time itemprop="datePublished" datetime="2018-10-11T09:45:00-03:00">
11/10/2018 09h45</time>
<meta itemprop="dateModified" content="2018-10-11T09:45:00-03:00">
</header>
<div itemprop="articleBody">
<p>article body</p>
</div>
</article>
</main>
You can see the preview button when testing a link from BBC news articles.
Getting the 'Preview' button
It seems that the 'Preview' button appears if you include a link element that points to an actual AMP page (it doesn’t seem to work with a fake/example URL), e.g.:
<link rel="amphtml" href="https://www.bbc.com/news/amp/world-europe-4582284">
In the preview, the snippets will be linked to this AMP URL.
Displaying images in the preview
The preview tool only displays images if they are already indexed by Google Search. If they are not yet indexed, a placeholder image will be displayed. See The Google Search Preview Tool:
Rich card placeholder images and title
If you are testing rich card markup, you can see your actual image in the preview if we confirm, or verify, that the image URL is in our index. However, the preview displays a placeholder image if our systems cannot verify the image URL. Even so, when your rich card markup reaches our systems, the image you provide should be shown correctly in the actual Google Search results.
We use schema.org to markup a number of different data types. I have typically relied on the Google testing tool to confirm that my schema is correct, but I've found that I get mixed results when testing with Bing, Yandex, Linter and MOZ.
Currently my 'aggregaterating' schema appears valid in Google's tester, but I get no results on Bing (can't find the markup) and Yandex/Linter both show errors. This makes me wonder if my schema is actually correct.
This was my original version which was OK on Google but got no results (no data found) on any of the other testers.
<div itemprop="aggregateRating" itemscope itemtype="https://schema.org/AggregateRating">
<meta itemprop="itemReviewed" content="https://schema.org/LocalBusiness">
<meta itemprop="ratingValue" content="4.6">
<meta itemprop="reviewCount" content="3,950">
</div>
This is my updated version that now, at least partially, is seen by Linter and Yandex. I still get nothing from MOZ and Bing.
<div itemscope="" itemtype="https://schema.org/Organization">
<meta itemprop="name" content="Company">
<div itemprop="aggregateRating" itemscope itemtype="https://schema.org/AggregateRating">
<meta itemprop="itemReviewed" content="https://schema.org/LocalBusiness">
<meta itemprop="ratingValue" content="4.6">
<meta itemprop="reviewCount" content="3,950">
</div></div>
Any feedback on the format? Something I am missing? Also, has anyone else had the mixed validation issue with other testers? I find that really odd.
While using Firefox (23.0.1) and jQuery Mobile (1.3.2), I get the following warning from my code: Empty string passed to getElementById(). The message appears in the console (Tools > Web Developer > Web Console). I would like to eliminate this warning.
I have seen a number of people ask similar questions, most notably: Best way to locate source of Warning: Empty string passed to getElementById() The answers seems to fairly consistently point to the use of '#', implying the user is at fault.
I have tried to produce what I feel is the bare minimum of valid code, and I've found this warning is still exhibited. I assume, from the other posts, that it is my code that is at fault. Can anyone show me how to fix this issue?
As per other users' comments, this warning does not appear in Chrome (version 29.0.1547.57)
Thanks in advance!
Minimum valid code that reproduces this issue:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<title>Test</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="css/jquery.mobile-1.3.2.css" />
<script src="js/jquery-1.9.1.js"></script>
<script src="js/jquery.mobile-1.3.2.js"></script>
</head>
<body>
<div data-role="page" id="TestPage">
<div data-role="content" id="TestContent">
<p>This is a test</p>
</div>
</div>
</body>
</html>
In my case it was caused because I forgot to specify a value for the 'for' attribute of a label:
Missing id
<label for="">Stuff:</label>
fixed
<label for="someID">Stuff:</label>
EDIT: Removing the for attribute also prevents that warning
<label>Stuff:</label>
As indicated in a deleted answer and in the comments, this was a bug in Mobile jQuery and it's now fixed. Compare the behavior of 1.3.2 vs 1.4.5 (the current version):
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<title>Test</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!--link rel="stylesheet" href="https://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css" /-->
<link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.css" />
<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
<script src="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.js"></script>
<!--script src="https://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.js"></script-->
</head>
<body>
<div data-role="page" id="TestPage">
<div data-role="content" id="TestContent">
<p>This is a test</p>
</div>
</div>
</body>
</html>
After going through your jsfiddle I still didn't get where the the function document.getElementById() is being called. I used to also face this problem, but since you are using jquery-mobile its better to use $(#id) as selector just check whether this reference document.getElementById() or $('#id') is being called before the DOM is ready..
I'm building a webpage in Notepad. I'm using html5 for the first time. I believe I did the correct coding to insert these images but they don't show up on the page. Here is the code: I could use some help, please. Thank you.
<html>
<head>
<title>My practice website</title>
<meta charset="utf-8">
<html lang="en">
<meta name="keywords" content="html, css, javascript, history, poems, poetry"/>
<meta name="description" content="This site is about my personal life, poems, poetry, images of family, myself"/>
<meta name="author" content="schweidel tyson">
<meta http-equiv="refresh" content="30" />
<link rel="stylesheet" type="text/css" href="mainstyesheet.css"/>
<body style="background-color: #ccffff;">
</head>
<body/>
<h1>Welcome to my website</h1>
<img src="http://www.html.net/logo.png"/>
<p>This is basically a personal website build to showcase my fledging talent in webdesign to put up pictures of my family and friends. I also like poetry, so there will be some poems.</p><b/>
This is a link to a good html tutorial<br/><br/>
This is another great tutorial link<br/><br/>
A tutorial for styles link
<img src=My practice website/My Website/images/high yellow.jpg" width="192 height="256"/><alt="African Amereican light-skined woman"><br/><br/>
<img src="http://www.zimbio.com/My website/images/trendy.jpg" width="352" width="400"/><alt="African American Woman">
<img src="My practice website/My website/my new pic.jpg" width="104" height="104"/> <alt="me at the domiciliary">
</body>
</html>
Your HTML is a bit off:
<img src="..." width="104" height="104"/> <alt="me at the domiciliary">
alt is just the alternate text for the image. It's an attribute just like width, src and height:
<img src="..." width="104" height="104" alt="me at the domiciliary" />
Also, make sure your URLs are correct.
Also, without a DOCTYPE, your markup is invalid. Include a DOCTYPE (here's a HTML5 one):
<!DOCTYPE html>
<html>
...
The project I work on takes random HTML files, converts them to XHTML as best as it can, and wraps them with some XML metdata. The DOCTYPE is stripped out as the resulting XML file is not an XHTML document. However when retrieving the wrapped XHTML from the XML file the DOCTYPE should be reinserted.
Because these are random HTML files they could contain any content, but I would prefer to not have to store or determine the original DTD. I figured that I should the Frameset DTD as it was just a superset of the Transitional DTD and would be valid for all content. However when using the W3C XHTML Validator with the same document, using the Transitional DTD passes but using the Frameset DTD fails.
I've stripped down the document to the minimum with which I can reproduce the problem. Here is the Frameset version:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:html="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Make The Move</title>
</head>
<body style="background: none;">
<h3 id="why">Why should I move to Linux?</h3>
</body>
</html>
And here is the Transitional version:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:html="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Make The Move</title>
</head>
<body style="background: none;">
<h3 id="why">Why should I move to Linux?</h3>
</body>
</html>
Please explain why this is happening, and how I should proceed.
Frameset DTD is not a 'superset' of transitional. It is a special DTD only used for laying out frames, not content (except inside <noframes> tag). It allows only <head> and <frameset> as the children of <html> tag.
Here is the specification.
Unless you know your page could have frames, stick to transitional or strict DTDs.
As Chetan pointed out, the Frameset DTD should only be used in case you need frames, and even then, I would recomend on using Transitional instead. If you don't rely on frames, Strict is the way to go.