Field Element (Field Types)

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Represents a characteristic of the field type.

<Field
  Name="Text">
</Field>

Attributes

Attribute	Description
Name	Required Text. A string that represents the name of the specific aspect of the field type that the Field element represents. The value must be one of the strings listed in the table below.

Child Elements

None

Parent Elements

FieldType Element (Field Types)

Remarks

Field element children of FieldType elements are configured in fldtypes*.xml files in C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\XML.

Each FieldType element has several required and optional Field elements distinguished by their Name attribute. The following table describes these elements. In the Windows SharePoint Services 3.0 object model, a field type is represented by the SPFieldTypeDefinition class. The latter class has a read-only property corresponding to all but two of the rows of the table. (The exceptions are InternalType and SQLType.) Except where noted otherwise, the property names match the value of the corresponding Name attribute.

Value of Field Element's Name Attribute	Description
AllowBaseTypeRendering	Optional Boolean. The default is FALSE. Represents whether a client application renders the field as its base type (also called the ParentType), if the client application cannot determine how to properly render the custom field type. If set to TRUE, and the client application cannot properly render the custom field type, the client application renders the field as the default Windows SharePoint Services parent field type from which it inherits.
FieldTypeClass	Optional String, but required for all your custom field types. Represents the strong name of the field type class library. "FieldTypeClass" includes the class name and assembly name with Version, Culture, and PublicKeyToken, for example, <Field Name="FieldTypeClass">CustomFieldTypes.RegularExpression.RegularExpressionField, CustomFieldTypes.RegularExpression, Version=1.0.0.0, Culture=neutral, PublicKeyToken=57e55365ec0ce80a</Field> (Only the fully qualified class name is included for field types built into Windows SharePoint Services 3.0.)
FieldEditorUserControl		Optional String. Represents the relative path to a field_typeFieldEditor.ascx file that defines a control that appears, in Windows SharePoint Services 3.0, in the Additional Column Settings section on the New Site Column page. The control enables column creators to set, for a particular column, the variable properties of the field type. E.g. "/_controltemplates/RegularExpressionFieldEditor.ascx". If there is no <Field Name="FieldEditorUserControl"> element, then the special properties of the field type are rendered by the PropertySchema Element (Field Types) element. FieldEditorUserControl should be a fixed, nonlocalizable string.
Filterable		Required Boolean. Represents whether a list with a column that is based on this field type can be filtered according to the value of the column that uses this type. If set to TRUE, the header of the column is a control that users can use to filter the list.
InternalType	Optional String. Represents an internal base type. Do not use a <Field Name="InternalType"> element in your custom field type definitions.
ParentType	Required String (but can be an empty string). Represents the name of the type from which the field class is derived. The possible values are exactly the same as the possible values for the Type attribute of the Field Element (List - Definition) element. If the field type is not derived from another type, then the value is an empty string: <Field Name="ParentType"></Field>. It must never be empty in your custom field types. All custom types inherit from another type. In the Windows SharePoint Services 3.0 object model ParentType is called BaseRenderingTypeName.
ShowOnListAuthoringPages	Optional Boolean. The default is TRUE. Represents whether this field type is displayed for inclusion on lists. If set to TRUE, Windows SharePoint Services displays this field type on list authoring pages so that users can include the field type on their lists. In the Windows SharePoint Services 3.0 object model ShowOnListAuthoringPages is called ShowOnListCreate.
ShowOnDocumentLibraryAuthoringPages	Optional Boolean. The default is TRUE. Represents whether this field type is displayed for inclusion in document libraries. If set to TRUE, Windows SharePoint Services displays this field type on document library authoring pages so that users can include the field type in their document libraries. In the Windows SharePoint Services 3.0 object model ShowOnDocumentLibraryAuthoringPages is called ShowOnDocumentLibraryCreate.
ShowOnSurveyAuthoringPages	Optional Boolean. The default is TRUE. Represents whether this field type is displayed for inclusion on surveys. If set to TRUE, Windows SharePoint Services displays this field type on survey authoring pages so that users can include the field type in their surveys. In the Windows SharePoint Services 3.0 object model ShowOnSurveyAuthoringPages is called ShowOnSurveyCreate.
ShowOnColumnTemplateAuthoringPages	Optional Boolean. The default is TRUE. Represents whether this field type should be displayed as a column template field type. If set to TRUE, Windows SharePoint Services displays this field type on column template authoring pages so that users can select to create a column template of this field type. In the Windows SharePoint Services 3.0 object model ShowOnColumnTemplateAuthoringPages is called ShowOnColumnTemplateCreate.
SQLType	Optional String. Represents the SQL data type that will be used to store the data in the content database. Do not use a <Field Name="SQLType"> element in your custom field type definitions.
Sortable	Required Boolean. Represents whether a list with a column that is based on this field type can be sorted on the column that uses this type. If set to TRUE, the header of the column is a control that users can use to sort the list.
TypeDisplayName	Required String. Represents the display name of the field type in the user interface (UI). In Windows SharePoint Services 3.0, it appears in the Type column on the Customize [list] page (listedit.aspx). It is also used in place of "TypeShortDescription" if the latter is not present. "TypeDisplayName" should be a localizable string.
TypeName	Required String. Represents the name of the field type. This must be unique among all field type names on the SharePoint server farm. "TypeName" should be a fixed, nonlocalizable string.
TypeShortDescription	Optional String. Represents the short description of the field type that is displayed in the UI. In Windows SharePoint Services 3.0 it appears with a radio button in the Name and Type section of the New Site Column and Create Column pages and in the Type column of the Site Column Gallery. If there is no <Field Name="TypeShortDescription"> element, then "TypeDisplayName" is used. "TypeShortDescription" should be a localizable string.
UserCreatable	Optional Boolean. The default is TRUE which enables users to add fields of this field type to lists. Setting the value to FALSE allows use of the field type in list schemas, but hides the field type from users on the Name and Type section of the New Site Column and Create Column pages.

Example

The following example defines a custom field type.

  <FieldType>
    <Field Name="TypeName">SocialSecurityNumber</Field>
    <Field Name="ParentType">Text</Field>
    <Field Name="TypeDisplayName">Social Security Number</Field>
    <Field Name="TypeShortDescription">Social Security Number (123456789, 123-45-6789)</Field>
    <Field Name="AllowBaseTypeRendering">TRUE</Field>
    <Field Name="FieldTypeClass">
      AdventureWorks.FieldTypes.SPFieldSSN, AdventureWorks.FieldTypes.SPFieldSSN,
      Version=1.0.0.0,Culture=neutral,PublicKeyToken=90734cc53324b79c
    </Field>
    <RenderPattern Name="DisplayPattern">
        <Column HTMLEncode="TRUE" /> 
        <Column HTMLEncode="TRUE" UseRelatedField="TRUE"/> 
    </RenderPattern>
  </FieldType>

See Also

Tasks

Walkthrough: Creating a Custom Field Type

Concepts

Custom Field Types

Custom Field Classes

Custom Field Type Property Rendering

Custom Field Type Definition