I'm trying to link a Brand to a Product with the following code:

<div itemscope itemtype="http://schema.org/Product" id="p2000">
   <meta itemprop="brand" itemscope itemtype="http://schema.org/Brand" itemref="v1437"/>

The Brand is already defined on the same web page above, inside an independant block:

<h1 itemscope itemtype="http://schema.org/Brand" id="v1437">
   <span itemprop="name">MyBrand</span>
   <meta itemprop="url" content="http://www.example.com/MyBrand"/>
   <meta itemprop="logo" content="http://www.example.com/MyBrand/logo.png"/>

The validator can't find the name property inside the linked Brand object

Can't find 'name'

The link between a Brand and a Person seems to be working, but the Person object is not displaying the Brand's name:

Not displaying 'name'

I can use the itemref and id attributes on other objects. I can link Offers to Products and Offers to Persons using the same way.

Is this a bug from the validator?


itemref does not work like that.

You have to add the itemref attribute to the element you want to apply a property to, and this property has to be defined on an element with the matching ID.

So your example should be:

<div itemscope itemtype="http://schema.org/Product" itemref="v1437">

<h1 itemprop="brand" itemscope itemtype="http://schema.org/Brand" id="v1437">
   <span itemprop="name">MyBrand</span>
   <link itemprop="url" href="http://www.example.com/MyBrand"/>
   <link itemprop="logo" href="http://www.example.com/MyBrand/logo.png"/>

(I changed two meta elements to link elements, which is required if the value is a URI.)

  • Thanks a lot, it's perfectly working but I would like to link the Brand to a Product and to an AggregateRating at the same time. I can't put both itemprop="brand" and itemprop="itemReviewed". Isn't there another way for that except duplicating the Brand item ? – Axel Isouard Sep 15 '15 at 8:29
  • Also, if I set an itemprop="WebPage" inside the body element, it tells me that it doesn't recognize the "brand" attribute. – Axel Isouard Sep 15 '15 at 8:32
  • 1
    New question : webmasters.stackexchange.com/q/85033/55879 – Axel Isouard Sep 15 '15 at 10:28
  • @AxelIsouard: Yeah, Microdata formally doesn’t allow to use properties that are not defined for a type (while RDFa and JSON-LD don’t disallow this), so you can’t use brand and itemReviewed together in Microdata -- And yes, if using itemref, you have to take care not to have this element as a child of a parent item (like WebPage) to which it doesn’t belong. It’s not always easy, and sometimes impossible, to achieve what you want with Microdata. – unor Sep 15 '15 at 19:47

i guess , that you get different Id's: in case of <meta itemprop="brand" itemscope itemtype="http://schema.org/Brand" itemref="v1437"/> is it v1437, in case of <div itemscope itemtype="http://schema.org/Product"></div> it will be p1437: thats why they aren't match and testing tool can't recognize them correctly

  • I have to name the Brand and Product differently, since I can't put two different elements with the same id. If they had the same id, the validator wouldn't recognize which one I would like to refer to. – Axel Isouard Sep 14 '15 at 14:46

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