RE: SDTT required attributes - who decides ?

Omar and Dan, very, very helpful information!


Take for example the Fact Check structure in the search-gallery link<>. From the dictionary analogy, there would still be no proof or implied endorsement by Google that “Fact check by” is itself a valid fact check. In the same way, technically, Webster or American Heritage’s endorsement of a word and its meaning doesn’t indicate how the word is used (think urban slang), whether the word is used or even if it’s English (in the case of an English language dictionary). Users of Google however, don’t view things this way, and I’d argue that users of dictionaries don’t view things this way either. If I go to and see “Approved by the Department of Austrian Higher Education” and that came from information STI put on their web site using structured data, how valid is that claim? Google attempts to answer that in the “Guidelines” offered for Factcheck. How does Google decide these guidelines?

For us, the schema around “valid child care provider” is an important dictionary element. How would we work together at defining guidelines for that element?

And, I apologize, I’ve been following this project for a few short months, if I’m asking something that makes no sense or I should ask elsewhere, let me know.

From: Dan Brickley <>
Sent: Tuesday, October 22, 2019 10:31 AM
To: Omar Holzknecht <>
Cc: Mailing List <>
Subject: Re: SDTT required attributes - who decides ?

Yes - that's how things are divided up. You can think of as a dictionary. Dictionaries don't tell you what to say, they just document the meaning of terms. It is natural for organizations (like Google) who make use of<> to document the specific combinations of terms that they make special use of, including whatever notions of "required" or "recommended" make sense for those applications. You can find a list of Google structured data -related features at - most of which are based on


On Tue, 22 Oct 2019 at 15:12, Omar Holzknecht <<>> wrote:


The requirements for certain Types and Properties in the Structured Data Testing Tool of Google are defined by Google themselves based on the requirements of their applications and use-cases (e.g. rich snippets in search results, actions within emails).

You can learn more about Google Guidelines for certain Types here:


On 22.10.19 15:45, Hugo Scott wrote:
Hi there
I was wondering who decides which attributes are "Required" and "Recommended" in Google's Structured Data tool - I'm guessing it's Google, right? Or maybe not. And what is it based on ?
Have a great day

Hugo Scott
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Omar J. Holzknecht, MSc

Semantic Technology Institute

University of Innsbruck

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Received on Tuesday, 22 October 2019 21:12:16 UTC