Using a standard like [hCard](http://microformats.org/wiki/hcard), [microdata](https://www.w3.org/TR/2009/WD-html5-20090825/microdata.html) or [RDFa](https://www.w3.org/TR/xhtml-rdfa-primer/) (you only need to pick one) make the contact information on the detail pages machine readable.