You may have noticed my recent posts about Schema, as I am in the process of improving my local signals with search engines. If you haven't then don't worry here is just some of relevant Schema JSON-LD I'm using:
"@context": "http://schema.org", "@type": "ProfessionalService", "additionalType": "http://www.productontology.org/id/Web_design", "name": "BYBE",
As you can see I'm using ProfessionalService with additionalType using The Product Types Ontology.
Since my local business is in the web design field I've opted to use:
http://www.productontology.org/id/Web_design I receive a 404 page:
ERROR (404): No respective entry available
productontology.org cannot provide a class definition fo the requested URI.
Reason: There is no Wikipedia article http://en.wikipedia.org/wiki/Web_design for 'Web_design'.
If you want to use this word (to be precise: this "lemma") as a class, you must first create a respective article in the English Wikipedia by clicking on the link given above.
Here is the direct link to create such a page in Wikipedia: http://en.wikipedia.org/w/index.php?title=Web_design&action=edit.
productontology.org cannot provide a class definition for some names. This can have several reasons:
- There is no English Wikipedia article for the requested name (lemma).
- We cannot show the respective entry for legal reasons, e.g. because the requested name is a registered trademark.
- We may also block certain lemmata if they are obviously unsuited as class names.
So the first thing I checked is if the page exists on Wikipedia and it does, so I thought maybe they don't support Web_design. So I visit their homepage and test their own examples and I'm surprised to find the same issue on everything.
Here is an example they list on the homepage:
- Should those URL's be returning valid pages?
- Should people avoid using The Product Types Ontology?