# Field Service Custom Fields on Standard Objects

A list of custom fields on standard Salesforce objects installed with the Field Service managed package.

See the [Field Service Apex Reference](/docs/service/field-service-dev/guide/fsl-dev-mp-intro.md) section for more API references related to the managed package.

- **[AssignedResource Custom Fields](/docs/service/field-service-dev/guide/fsl-custom-fields-object-assignedresource.md)**

  Custom fields associated with a service resource who is assigned to a service appointment in Field Service. Assigned resources appear in the Assigned Resources related list on service appointments. This object is available in API version 38.0 and later.

- **[ResourceAbsence Custom Fields](/docs/service/field-service-dev/guide/fsl-custom-fields-object-resourceabsence.md)**

  Custom fields associated with a time period in which a service resource is unavailable to work in Field Service.

- **[ServiceAppointment Custom Fields](/docs/service/field-service-dev/guide/fsl-custom-fields-object-serviceappointment.md)**

  Custom fields associated with an appointment to complete work for a customer in Field Service.

- **[ServiceResource Custom Fields](/docs/service/field-service-dev/guide/fsl-custom-fields-object-serviceresource.md)**

  Custom fields associated with a field service technician or crew in Field Service.

- **[ServiceResourceCapacity Custom Fields](/docs/service/field-service-dev/guide/fsl-custom-fields-object-serviceresourcecapacity.md)**

  Custom fields associated with the maximum number of scheduled hours or number of service appointments that a capacity-based service resource can complete within a specific time period.

- **[ServiceTerritory Custom Fields](/docs/service/field-service-dev/guide/fsl-custom-fields-object-serviceterritory.md)**

  Custom fields associated with a geographic or functional region in which field service work can be performed in Field Service.

- **[TimeSlot Custom Fields](/docs/service/field-service-dev/guide/fsl-custom-fields-object-timeslot.md)**

  Custom fields associated with a period of time on a specified day of the week during which field service work can be performed in Field Service. Operating hours consist of one or more time slots.

- **[WorkOrder Custom Fields](/docs/service/field-service-dev/guide/fsl-custom-fields-object-workorder.md)**

  Custom fields associated with field service work to be performed for a customer.

- **[WorkOrderLineItem Custom Fields](/docs/service/field-service-dev/guide/fsl-custom-fields-object-workorderlineitem.md)**

  Custom fields associated with a subtask on a work order in field service.