The Attributes tab is used to define attributes for the thing definition. Attributes are simple key-value pairs for that are used to define characteristics of a thing. For example, the VIN on a car, a serial number of a piece of equipment, a customer name, and so on. If the Auto def attributes field is selected in the thing definition, a thing automatically defines a key-value pair, that was not previously defined in the thing's thing definition.
Unlike properties and alarms, attributes do not have a timestamp component, so they cannot be graphed on the thing's page in the Management Portal. The attribute's value is displayed on the thing's page.
Selecting the + Attribute Definition link will display a New attribution definition section. Selecting the - Delete attribute definition link will delete the currently displayed attribute.
Enter or select the fields for the new attribute definition. The fields are:
|Key||The key for the attribute definition.|
A key is an identifier that must be globally unique within the organization.
The valid characters for a key are letters, numbers, "_" (underscore), and "-" (hyphen).
|Name||The name of the attribute definition that is displayed on Management Portal pages.|
|Default value||The value that should be returned if the attribute has never been set before.|
|View security tags||Enter any number of tags to the attribute that controls whether a user or application can view the attribute. The user or application must have a role that has the same view security tag associated with it in order to view an attribute with a view security tag associated with it.|
|Update security tags||Enter any number of tags to the attribute that controls whether a user or application can update the attribute. The user or application must have a role that has the same update security tag associated with it in order to update an attribute with an update security tag associated with it.|