A limit on the number of records to return in a single request, similar to a page size. This can be a value between 1 and the maximum $top value for a particular endpoint, typically 200. If no $top value is specified, an endpoint’s default $top size is used, typically 50. If an endpoint has a default $top but no maximum $top, you can retrieve all values by sending the $top parameter with no values (e.g., resources?$top=). The maximum and default values are documented for each endpoint.