2.3.1 Base Field Types

The following table describes the field types that are defined and used by the base types of a protocol server.

Field type name	Description
AllDayEvent	This field type is used only in conjunction with an Events list. TRUE if the item is an all-day event (that is, does not occur during a specific set of hours in a day).
Attachments	This field type describes whether one or more files are associated with the item. See Attachments in Base Data Fields (section 2.4.2) for more information about attachments. TRUE if a list item has attachments, and FALSE if a list item does not have attachments.
Boolean	This field type can be set to TRUE or FALSE.
Calculated	This field type value is calculated based on the value of other columns.
Choice	This field type enables selection from a set of suggested values. A property on a choice field specifies whether values other than the suggested values are supported.
Computed	This field type renders output based on the value of other columns.
ContentTypeId	This field type contains a content type identifier for an item. ContentTypeId conforms to the structure defined in Content Type Id (section 2.1.2.8.1).
Counter	This field type is a monotonically increasing integer field that has a unique value in relation to other values stored for the field in the list. This field is used only for the list item identifier field, and not intended for use elsewhere.
CrossProjectLink	This field type enables a link to a Meeting Workspace site.
Currency	This field type provides for currency-related data. This field has a CurrencyLocaleId property that takes the locale identifier of the desired currency.
DateTime	This field type enables full date and time values, as well as date-only values.
Error	Specifies errors.
File	Specifies a reference to a file to retrieve the contents of that file.
GridChoice	This field type enables specification of multiple number scales in a list.
Geolocation	This field type accepts location by longitude, latitude, and possibly altitude.
Guid	Specifies that the value of the field (2) is a GUID.
Integer	This field type accepts an integer value.
Invalid	Field type is not specified.
Lookup	This field type enables a reference to another list item. It enables specification of a list identifier for a targeted list. An optional site identifier can also be specified, which specifies the site (2) of the list that contains the target of the lookup field.
MaxItems	Specifies the maximum number of items.
ModStat	Specifies the current status of a moderation process on the document. Value corresponds to one of the moderation status values specified in [MS-WSSFO3] section 2.2.1.2.13.
MultiChoice	This field type accepts one or more values from a set of specified choices. This field (2) also accepts free-form values.
Note	This field type accepts a string of text, which can be longer than a Text field (2).
Number	This field type accepts a positive or negative number. A number field (2) supports a setting at the field (2) level that specifies the number of decimal places to display.
PageSeparator	Represents a placeholder for a page separator in a survey list. This field type is intended to be used only with a survey list.
Recurrence	Specifies a field that is used to display recurring events. As with a computed field, this field type is an abstract field type that depends on other fields (2) for its content and definition. It is intended to be used only with an events list.
Text	This field type accepts a string of text up to 255 characters in length.
Threading	Contains data on the threading of items in a discussion board.
ThreadIndex	Contains a compiled index of threads in a discussion board.
User	A lookup field to a user in the User Info list.
URL	This field type accepts a URL and an optional description of the URL.
WorkflowEventType	A description of a type of a historical workflow event. See WorkflowEventType Enumeration (section 2.8.1) for more information.
WorkflowStatus	Contains status on a running workflow for an item. See WorkflowStatus (section 2.8.2) for more details.