> For the complete documentation index, see [llms.txt](https://docs.jmapcloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.jmapcloud.io/en/jmap-cloud-portal/user-guide-for-jmap-cloud-portal/creating-forms/form-design/form-components.md). # Form Components Form components are generally associated with an attribute or field of the data source, with the exception of **Label** and **Attachments** components, which are not directly linked to data. The following sections describe: * The different types of available components. * The parameters for each component type. * The component management features within a form. ## Component Types JMap Cloud Portal offers several component types to adapt forms to various functional and visual needs.

Component	Description
Label	Static text displayed as-is in the form.
Text	Input field for an alphanumeric value. The associated attribute/field must be of type Text.
Number	Input field for a numeric value. The associated attribute/field must be of type Number.
Boolean	Used to populate the associated attribute/field for which only 2 possible values exist, corresponding to the checked and unchecked states of the component. The associated attribute/field can be of type Text or Number.
Date	Allows the user to select a date. The associated attribute/field must be of type Date or DateTime.
List	A list of values from which, depending on the configured parameter, either a single value (single choice) or multiple values (multiple choice) can be selected. The associated attribute/field must be of type Text or Number and must have a value domain that determines the possible values the attribute/field can take.
Attachment	Allows a JMap NG application user to attach one or more files to a feature or record in the data source. See the Data Source Attachments section for details. Only one Attachment component can be added to a form. The data source must have a linking attribute/field selected, and it must be unique and non-null. Note: If the linking attribute/field is modified after attachments have been added, the attachments are detached from the features/records but are not deleted.
Table	Allows a JMap NG application user to create and edit data from a table associated with a feature or record in the data source. A relationship must be configured between the data source and the table. If the table data is editable, you must configure a form for the table. Example: A point layer represents air quality monitoring stations. A table contains the pollutant measurements taken at each station on different dates. For each monitoring station, there can be 0, 1, or multiple measurements. In the attribute form for the monitoring station layer, the Table component displays a table containing pollutant concentration data at different dates. Each row corresponds to a measurement of a pollutant on a given date.

## Component Parameters Each component type has specific parameters that control its behavior and appearance (e.g., default text, format, style, constraints, etc.).

Parameter	Description
Attribute	Select the layer attribute or table field to which the component is associated. This is the attribute or field that the form component will populate.
Title	Assign a title to the component.
Text	Attachment and Label components. Text of the label or of the form section that contains the attachments.
Define linking attribute	Attachment component. If not already done, click the button to open the data source configuration interface and define the linking attribute. If the linking attribute is already defined, this parameter is not displayed. This attribute is used to associate attachments with features or records in the data source. It must be unique and non-null. Note: If the linking attribute is modified after attachments have been added, the attachments are detached from the features/records but are not deleted.
Default value	Enter or select a default value to initialize the input field. This option should be used for a component that has a default value.
Choice	List component. Select the list type: single choice or multiple choice.
Display	Select the display type of the component in the form. Text: Single line or Multiple lines. List: Radio button or Selection. Boolean: Checkbox or Toggle. Number: Input field or Slider.
Value domain	List component. This section allows you to view the attribute's value domain. If you want to modify the values, click Show value domain to open the data source Attributes tab interface. You can then edit the values. If the attribute has no value domain, a Create value domain button appears; clicking it opens the data source Attributes tab interface where you can create the value domain.
Minimum	Number component. Enter the minimum value for the attribute.
Maximum	Number component. Enter the maximum value for the attribute.
Checked value	Boolean component. Specify the value to record when the checkbox is checked or the toggle is enabled.
Unchecked value	Boolean component. Specify the value to record when the checkbox is unchecked or the toggle is disabled.
Status / Required	Determines whether the field is required. The user will not be able to submit the form until all required fields are filled in. Required fields are identified by an asterisk (*) in the form designer.
Status / Read only	Enable this option to set the component to read-only mode. The user will not be able to modify the content.
Relationship	Table component. Select the relationship used to link the table to the data source. The relationship must be defined beforehand.
Visible attributes	Table component. Select the table attributes that will be visible in the form. If the table is editable, you must configure a form for the table to edit these attributes.
Sort by	Table component. Select the attribute used to sort table records in the form.

## Working with Components ### Adding a Component To add a component to a form, drag it from the palette and drop it into the **Design** tab interface. Components can be inserted into containers for [layout](/en/jmap-cloud-portal/user-guide-for-jmap-cloud-portal/creating-forms/form-design/form-layout.md) purposes. {% hint style="info" %} By default, components are stacked vertically in the form. {% endhint %} ### Configuring a Component To configure a component already placed in the form, click it in the **Design** tab. The editable parameters are displayed in the **Properties** section. The spatial arrangement of components can be adjusted using the layout tools, described in the following section. ### Removing a Component To remove a component, click it in the **Design** tab, then click