<https://larryullman.com/forums/index.php?/topic/29-part-3-physical-products-ch8-creating-a-catalog/#comment-67>
<http://schema.org/text>
"I can look at your code. However, as I've said twice now in this post, I don't think the problem is in the code but rather in your directory structure and URLs. Neither of which have you provided yet. \n  \n  \n\n  \nIf your directory structure is the same as that in the book, that's great, but your directory structure is not the same as in the book. In the book the files are in the Web root directory (htdocs), but you've placed everything within a subdirectory. This is fine, too, but you have to change all references accordingly. For example, the link to ./physical_product/shop/coffee is incorrect. The initial period means the link is relative to the current page, which won't often be the case. What you want instead is /physical_product/shop/coffee (as I wrote before), where the initial / means to start in the Web root directory. \n"
<https://larryullman.com/forums/index.php?/topic/29-part-3-physical-products-ch8-creating-a-catalog/#comment-308>