I have tested the Schema.org breadcrumb
example with Google Rich Snippets testing tool.
<div itemprop="breadcrumb">
<a href="category/books.html">Books</a> >
<a href="category/books-literature.html">Literature & Fiction</a> >
<a href="category/books-classics">Classics</a>
</div>
The result is that it is not recognized by the tool.
So, is there a bug or is there a syntax problem? If so, what is the correct syntax?
Your question is a bit the same with this one How to implement schema.org markup for a breadcrumb?
According to Google Webmaster Central Help Forum, it is not recommended by experts to use the schema.org breadcrumb markup for the time being,it's seems that "there is some sort of glitch in the schema.org breadcrumb structure". Instead, it is exhorted to use the data-vocabulary.org breadcrumb markup, which Google and the other search engines can easily read as well.
A data-vocabulary.org Breadcrumb markup example:
<div>
<span itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="http://www.example.com/" itemprop="url">
<span itemprop="title">example</span>
</a> >
</span>
<span itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="http://www.example.com/fashion/" itemprop="url">
<span itemprop="title">Fashion</span>
</a> >
</span>
<span itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="http://www.example.com/fashion/women/" itemprop="url">
<span itemprop="title">Women</span>
</a> >
</span>
<span itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="http://www.example.com/fashion/women/boots/" itemprop="url">
<span itemprop="title">Boots</span>
</a>
</span>
</div>