Hi,

I’m currently trying to design an openings hours form so I looked into https://schema.org/OpeningHoursSpecification but there are many things I’m not sure about.

• can dayOfWeek be a collection? The name and its description imply this is not possible but Google says it is, and IMO it feels better.
• can validFrom appear without validThrough (and vice versa)?
• would it make sense to not have both validFrom and validThrough in a specialOpeningHoursSpecification?
• are an OpeningHoursSpecification’s time slots merged? E.g. would

{
    "openingHoursSpecification": [
        {
            "@type": "OpeningHoursSpecification",
            "dayOfWeek": "https://schema.org/Monday",
            "opens": "09:00",
            "closes": "21:00"
        },
        {
            "@type": "OpeningHoursSpecification",
            "dayOfWeek": "https://schema.org/Monday",
            "opens": "08:00",
            "closes": "12:00"
        },
    ]
}

be equivalent to

{
    "openingHoursSpecification": [
        {
            "@type": "OpeningHoursSpecification",
            "dayOfWeek": "https://schema.org/Monday",
            "opens": "08:00",
            "closes": "21:00"
        }
    ]
}

• do specialOpeningHoursSpecification time slots replace openingHoursSpecification’s ones when they intersect?
• does it make sense to say a place is closed outside of specialOpeningHoursSpecification?
• if a time slot is considered closed when it has no opens property, how can we say for a restaurant e.g. it is exceptionally closed the evening of a given day (while remaining open at noon)? Google’s solution to have the same hour for opens and closes seems more practical.

I looked around but I wasn’t able to find a consensus 😕