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Correct way to use multiple itemtypes in Microdata
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Closed 4 years ago.
I am wondering if I can use multiple itemtypes inside one item scope. For example I have this at the moment:
<body id="home" itemscope itemtype="http://schema.org/WebPage">
<div class="wrapper" itemscope itemtype="http://schema.org/ProfessionalService">
<p itemprop from professional service></p>
<p itemprop from web page></p>
</div>
</body>
When I do a structured data test within Google's Web developer tools it only picks up items within the professional service schema and every itemprop that is related to the webpage schema is ignored and not recognised as part of the professional service. I understand about nesting them and why it's happening.
Can I have a multiple itemtype within an item scope? Such as:
<div class="wrapper" itemscope itemtype="http://schema.org/ProfessionalService http://schema.org/WebPage">
<p itemprop from professional service></p>
<p itemprop from web page></p>
</div>
Yes, you can use several item types in one itemtype attribute, as long as they are from the same vocabulary. See Microdata: itemtype:
The itemtype attribute, if specified, must have a value that is an unordered set of unique space-separated tokens that are case-sensitive, each of which is a valid URL that is an absolute URL, and all of which are defined to use the same vocabulary.
But note that then all properties (itemprop values) need to be defined for all the specified item types. So you cannot say that a particular property should belong only to a particular item type.
So you’d still have the same problem. In your case, you should either use correct nesting, or you might use the itemref attribute to add properties to the corresponding items that are scattered on the page.
FWIW, the schema.org vocabulary also defines the additionalType property. This can also be used to specify additional item types from other vocabularies. But this doesn’t allow you to use the properties from the additional item type.
Related
Is there an option to add custom attributes to a scheme? (same as we can expand DTD?)
itemprop="description" isn't enough for me. I got more attributes that I wish to add, that do not exist in the original scheme:
Objective
Duration
Availability
I need this attributes cause they project the full characteristic of my product.
In Microdata, you can use a "proprietary item property name":
one used by the author for private purposes, not defined in a public specification
It has to be an absolute URL, e.g.:
<div itemscope itemtype="http://schema.org/Thing">
<p itemprop="description">…</p>
<p itemprop="http://example.com/voc/objective">…</p>
</div>
(Of course you can’t expect other consumers to make use of it.)
If you are using the Schema.org vocabulary, you could also:
propose new Schema.org properties/types
extend an existing Schema.org property (but it’s considered outdated)
I'm creating a web page and currently I'm adding Microdata markup to the code. I’m using schema.org’s MusicGroup.
I have an index.html page from where I'd like to take the name and the image properties for this band:
<div class="container" itemscope itemtype="http://schema.org/MusicGroup">
...
<img itemprop="image" src="img/logo.png" alt="logo" />
<p>We are <span itemprop="name">NAME OF THE BAND</span>.</p>
...
</div>
However on the about_us.html page there is a short description which I'd also like to use:
<div class="container" itemscope itemtype="http://schema.org/MusicGroup">
...
<p itemprop="description">A description of the band.</p>
...
</div>
When I use the code like this, search enginges (understandably) treat them as two different MusicGroups:
MusicGroup 1:
Image: .../img/logo.png
Name: NAME OF THE BAND
MusicGroup 2:
Description: A description of the band.
How can I link these properties into one item?
Microdata’s name-value pairs are per webpage, not per website.
So on a website about a music group, it can be expected that each page contains an "own" MusicGroup item, which is, however, actually always about the same music group. But from the Microdata or schema.org perspective, these different items would not be semantically connected that way (consumers might guess this however, e.g. by comparing property values).
Microdata’s itemid attribute could be used to uniquely identify each item. But it is required that the used vocabulary supports "global identifiers for items" (itemid is used for some types on schema.org (e.g., in the example for MedicalScholarlyArticle), but it’s not clear to me if it’s really supported as required by Microdata for other types, like MusicGroup).
So in your case, you could:
leave it as it is
duplicate the information, so that each item has all relevant content (possibly using meta/link elements)
move all information on one page (possibly using itemref)
(if it should be allowed for general use with schema.org) use itemid to state that several items are actually about the same thing
I'm working on a product page on a eComm solution and I'm using Schema.org for the first time. I have a product name and inside of that is the brand and model. Is this acceptable?
<h2 itemprop="name">
<span itemprop="brand">Brand Name</span>
<span itemprop="model">######</span>
</h2>
I can't see anywhere in the Microdata spec that explicitly allows this but it looks like the Google parser accepts it.
The algorithm for finding the value of a property defines (in the last step, which applies in your example):
The value is the element's textContent.
(i.e., the text content of the element and its child elements)
So according to this, the value of name should be "Brand Name ######".
The algorithm for finding the properties of an item contains this step:
If current does not have an itemscope attribute, then: add all the child elements of current to pending.
So the child elements of an element containing itemprop are checked for itemprop attributes, too.
i need to scrap information form a website contain the property details.
<div class="inner">
<div class="col">
<h2>House in Digana </h2>
<div class="meta">
<div class="date"></div>
<span class="category">Houses</span>,
<span class="location">Kandy</span>
</div>
</div>
<div class="attr polar">
<span class="data">Rs. 3,600,000</span>
</div>
what is the xpath notation for "Kandy" and "Rs. 3,600,000" ?
It is not wise to address text nodes directly using text() because of nuances in an XML document.
Rather, addressing an element node directly returns the concatenation of all descendant text nodes as the element value, which is what people usually want (and think they are getting when they address text nodes).
The canonical example I use in the classroom is this example of OCR'ed content as XML:
<cost>39<!--that 9 may be an 8-->.22</cost>
The value of the element using the XPath address cost is "39.22", but in XSLT 1.0 the value of the XPath address cost/text() is "39" which is not complete. In XSLT 2.0 (which is how the question is tagged), you get two text nodes "39" and ".22", which if you concatenate them it looks correct. But, if you pass them to a function requiring a singleton argument, you will get a run-time error. When you address an element, the text returned is concatenated into a single string, which is suitable for a singleton argument.
I tell students that in all of my professional work there are only very (very!) few times that I ever have to use text() in my stylesheets.
So //span[#class='location' or #class='data'] would find the two fields if those were the only such elements in the entire document. You may need to use ".//span" from a location inside of the document tree.
I been trying for over 2 hours to import timestamp from zap2it.com link to my google spreasheet.
Here is link I am trying to importxml from.
http://affiliate.zap2it.com/tvlistings/ZCGrid.do?zipcode=78238&lineupId=DISH641:-
Here is what I am tryign to import
Here is what I tried so far
=importxml("http://affiliate.zap2it.com/tvlistings/ZCGrid.do?aid=dish&pkg=8388608&fromProvider=true&zipcode=78238&x=52&y=18"&B1,"//body//div[3]/div/div/div[3]/div/div")
EDIT
I was able to improve and get better results
//body//div[3]/div/div/div[1]//*
but it shows timestamp from all over the page. not exactly what I need.
[The first complication is that the data stream returned from dereferencing that URI is not actually XML; it has several thousand well-formedness errors (unescaped ampersands in URIs, unescaped ampersands and less-than signs in scripts, some embedded HTML, some miscellaneous errors). Since you're not reporting problems from that, however, I'll assume that somewhere between the server and your XPath expression someone is doing some tidying.]
I think you'll get better results if you use the id and class attributes that are extensively used in the document. The material you want looks like this in the source (you can use any browser-based debugging tool to find it; I used the 'Web Inspector' in Safari); I have indented to make the structure more visible, and fixed some well-formedness errors in one of the a elements (missing whitespace between attribute-value pairs).
<div class="zc-tn" id="zc-tn-top">
<div class="zc-tn-i">
<a href="ZCGrid.do?fromTimeInMillis=1355781600000"
class="zc-tn-l"
title="Move the grid three hours earlier"></a>
<div class="zc-tn-c">
<span class="zc-tn-z"
title="Central Standard Time">CST</span>
<div class="zc-tn-t">7:00 PM</div>
<div class="zc-tn-t">7:30 PM</div>
<div class="zc-tn-t">8:00 PM</div>
<div class="zc-tn-t">8:30 PM</div>
<div class="zc-tn-t">9:00 PM</div>
<div class="zc-tn-t">9:30 PM</div>
</div>
<a href="ZCGrid.do?fromTimeInMillis=1355803200000"
class="zc-tn-r"
title="Advance the grid three hours"></a>
</div>
</div>
A simple search verifies that the value zc-tn-top is indeed unique as an ID value in the document. Given that, a simple XPath expression to retrieve all the elements whose display is circled in your image is (assuming xhtml is bound to the XHTML namespace):
//xhtml:div[#id='zc-tn-top']//xhtml:div[#class='zc-tn-t']
It looks from your question as if your XPath evaluator is namespace-challenged or namespace-oblivious, so you may need to write this as
//div[#id='zc-tn-top']//div[#class='zc-tn-t']