I have currently implemented my breadcrumbs like this:
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="HOME URL" itemprop="url">
<span itemprop="title">HOME TITLE</span>
</a> >
</div>
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="1ST LEVEL URL" itemprop="url">
<span itemprop="title">1ST LEVEL TITLE</span>
</a> >
</div>
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<span itemprop="title">CURRENT TITLE</span>
</div>
As you can see, I haven't specified a url for the current page, which would be redundant. But when I try the Google testing tool, I get an error saying that the url is missing for the current page breadcrumb.
Given that, I have three options that I can think of.
I specify a url for the current page:
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="HOME URL" itemprop="url">
<span itemprop="title">HOME TITLE</span>
</a> >
</div>
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="1ST LEVEL URL" itemprop="url">
<span itemprop="title">1ST LEVEL TITLE</span>
</a> >
</div>
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="CURRENT LEVEL URL" itemprop="url">
<span itemprop="title">CURRENT TITLE</span>
</a>
</div>
I just display the current page title without including it in the structured data markings:
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="HOME URL" itemprop="url">
<span itemprop="title">HOME TITLE</span>
</a> >
</div>
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="1ST LEVEL URL" itemprop="url">
<span itemprop="title">1ST LEVEL TITLE</span>
</a> >
</div>
<span>CURRENT TITLE</span>
I don't display the current level in the breadcrumbs (I don't want to do that I must say):
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="HOME URL" itemprop="url">
<span itemprop="title">HOME TITLE</span>
</a> >
</div>
<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb">
<a href="1ST LEVEL URL" itemprop="url">
<span itemprop="title">1ST LEVEL TITLE</span>
</a>
</div>
What do you think it's best I should do?