Identifies the volume of publication or multi-part work; for example, "iii" or "2".

The number of answers this question has received.

The number of seasons in this series.

Size of the application / package (e.g. 18MB). In the absence of a unit (MB, KB etc.), KB will be assumed.

The number of copies when multiple copies of a piece of artwork are produced - e.g. for a limited edition of 20 prints, 'artEdition' refers to the total number of copies (in this example "20").

The number of interactions for the CreativeWork using the WebSite or SoftwareApplication.

The total number of individuals that may attend an event or venue.

The number of attendee places for an event that remain unallocated.

Defines the month(s) of the year on which a recurring [Event](https://schema.org/Event) takes place. Specified as an [Integer](https://schema.org/Integer) between 1-12. January is 1.

Defines the day(s) of the month on which a recurring [Event](https://schema.org/Event) takes place. Specified as an [Integer](https://schema.org/Integer) between 1-31.

Defines the number of times a recurring [Event](https://schema.org/Event) will take place.

The number of items in the [Collection](https://schema.org/Collection).

The productReturnDays property indicates the number of days (from purchase) within which relevant product return policy is applicable.

Indicates a property used as a constraint to define a [StatisticalPopulation](https://schema.org/StatisticalPopulation) with respect to the set of entities corresponding to an indicated type (via [populationType](https://schema.org/populationType)).

Indicates the number of constraints property values defined for a particular [ConstraintNode](https://schema.org/ConstraintNode) such as [StatisticalVariable](https://schema.org/StatisticalVariable). This helps applications understand if they have access to a sufficiently complete description of a [StatisticalVariable](https://schema.org/StatisticalVariable) or other construct that is defined using properties on template-style nodes.

The number of positions open for this job posting. Use a positive integer. Do not use if the number of positions is unclear or not known.

The total integer number of bathrooms in some [Accommodation](https://schema.org/Accommodation), following real estate conventions as [documented in RESO](https://ddwiki.reso.org/display/DDW17/BathroomsTotalInteger+Field): "The simple sum of the number of bathrooms. For example for a property with two Full Bathrooms and one Half Bathroom, the Bathrooms Total Integer will be 3.". See also [numberOfRooms](https://schema.org/numberOfRooms).

The number of credits or units awarded by a Course or required to complete an EducationalOccupationalProgram.

The maximum number of students who may be enrolled in the program.

The number of credits or units a full-time student would be expected to take in 1 term however 'term' is defined by the institution.

Specifies either a fixed return date or the number of days (from the delivery date) that a product can be returned. Used when the [returnPolicyCategory](https://schema.org/returnPolicyCategory) property is specified as [MerchantReturnFiniteReturnWindow](https://schema.org/MerchantReturnFiniteReturnWindow).

The maximum physical attendee capacity of an [Event](https://schema.org/Event) whose [eventAttendanceMode](https://schema.org/eventAttendanceMode) is [OfflineEventAttendanceMode](https://schema.org/OfflineEventAttendanceMode) (or the offline aspects, in the case of a [MixedEventAttendanceMode](https://schema.org/MixedEventAttendanceMode)).

The maximum virtual attendee capacity of an [Event](https://schema.org/Event) whose [eventAttendanceMode](https://schema.org/eventAttendanceMode) is [OnlineEventAttendanceMode](https://schema.org/OnlineEventAttendanceMode) (or the online aspects, in the case of a [MixedEventAttendanceMode](https://schema.org/MixedEventAttendanceMode)).

Defines the week(s) of the month on which a recurring Event takes place. Specified as an Integer between 1-5. For clarity, byMonthWeek is best used in conjunction with byDay to indicate concepts like the first and third Mondays of a month.