| 8:05 pm on May 8, 2011 (gmt 0)|
I've never seen anything official given as a preferred mark-up approach. Have you considered using View Source to see how sites with breadcrumbs showing in the SERPs are doing it?
| 8:14 pm on May 8, 2011 (gmt 0)|
I believe this would be the most "official" information
There is also a video for "why breadcrumbs are not showing" from Googlewebmasterhelp
| 8:21 pm on May 8, 2011 (gmt 0)|
As SanDiegoFreelance says, you can either use Microdata or RDFa to do it.
Google do say that they can now automatically detect breadcrumb navigation (not marked up in RDFa or microdata) - and this might be true - but one of my sites does breadcrumb navigation like you mentioned in your OP and Google have never detected it. Then on a new website I marked it up with microdata and Google shown the changes in the SERPs within a week.
| 4:39 pm on May 9, 2011 (gmt 0)|
@tedster: I got what I posted from a site that was showing up already. Just wanted to see if there was something more structured.
@SanDiegoFreelance: Thanks a lot, exactly what I was looking for!
| 4:49 pm on May 9, 2011 (gmt 0)|
I think > is good enough for google to detect the breadcrumbs.That worked for me.
But I have also seen some major sites, who deliberately seem to be avoiding the breadcrumbs by using an image instead of >
| 5:20 pm on May 9, 2011 (gmt 0)|
With regard to the character in use, on Google's Help page example, they are using › not > - that seems like an odd choice to me, because "greater than" makes at least some intuitive sense to me, compared to a "right single angle quote"