| Property | On Types | description |
|---|---|---|
| contentRating | Official rating of a piece of content—for example, 'MPAA PG-13'. | |
| reviewRating | The rating given in this review. Note that reviews can themselves be rated. The `` reviewRating`` applies to rating given by the review. The aggregateRating property applies to the review itself, as a creative work. | |
| starRating | An official rating for a lodging business or food establishment, e.g. from national associations or standards bodies. Use the author property to indicate the rating organization, e.g. as an Organization with name such as (e.g. HOTREC, DEHOGA, WHR, or Hotelstars). |
| Property | Expected Type | description |
|---|---|---|
| author | The author of this content or rating. Please note that author is special in that HTML 5 provides a special mechanism for indicating authorship via the rel tag. That is equivalent to this and may be used interchangeably. | |
| bestRating | Text Number | The highest value allowed in this rating system. If bestRating is omitted, 5 is assumed. |
| ratingExplanation | Text | A short explanation (e.g. one to two sentences) providing background context and other information that led to the conclusion expressed in the rating. This is particularly applicable to ratings associated with "fact check" markup using ClaimReview. |
| ratingSource | Text | The source provider who the ratings were conducted by. For example, google or tmpc. |
| ratingValue | Number Text | The rating for the content.\n\nUsage guidelines:\n\n Use values from 0123456789 (Unicode 'DIGIT ZERO' (U+0030) to 'DIGIT NINE' (U+0039)) rather than superficially similar Unicode symbols.\n Use '.' (Unicode 'FULL STOP' (U+002E)) rather than ',' to indicate a decimal point. Avoid using these symbols as a readability separator. |
| reviewAspect | Text | This Review or Rating is relevant to this part or facet of the itemReviewed. |
| worstRating | Text Number | The lowest value allowed in this rating system. If worstRating is omitted, 1 is assumed. |
| Property | Expected Type | description |
|---|---|---|
| additionalType | URL | An additional type for the item, typically used for adding more specific types from external vocabularies in microdata syntax. This is a relationship between something and a class that the thing is in. In RDFa syntax, it is better to use the native RDFa syntax - the 'typeof' attribute - for multiple types. Schema.org tools may have only weaker understanding of extra types, in particular those defined externally. |
| alternateName | Text | An alias for the item. |
| description | Text | A description of the item. |
| disambiguatingDescription | Text | A sub property of description. A short description of the item used to disambiguate from other, similar items. Information from other properties (in particular, name) may be necessary for the description to be useful for disambiguation. |
| identifier | The identifier property represents any kind of identifier for any kind of Thing, such as ISBNs, GTIN codes, UUIDs etc. | |
| image | URL ImageObject | An image of the item. This can be a URL or a fully described ImageObject. |
| instanceOf | Type to which this subject belongs. Use for membership in a value set (Enumeration), not inheritance. Example: K2 instanceOf mountain; volcano subClassOf mountain. | |
| mainEntityOfPage | URL CreativeWork | Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See background notes for details. |
| name | Text | The name of the item. |
| potentialAction | Indicates a potential Action, which describes an idealized action in which this thing would play an 'object' role. | |
| sameAs | URL | URL of a reference Web page that unambiguously indicates the item's identity. E.g. the URL of the item's Wikipedia page, Wikidata entry, or official website. |
| subjectOf | A CreativeWork or Event about this Thing. | |
| url | URL | URL of the item. |