Relationship File Descriptor Has Attribute

The relationship File Descriptor Has Attribute is only relevant for a file descriptor of structure JSON. The relationship enables you to model an attribute of a JSON payload.

Attribute	Type	Description
ID	String	ID of the attribute.
Static Value	String	Value of the attribute if it is constant.
Target ID	Property	Property from which the value of the attribute is taken if it is variable in a write request. Property which is set by the value of the attribute in a read request.
Type	Selection	Type of the attribute.

Note: The Static Value attribute can also be used if a JSON file descriptor is read, for example, via a REST GET service. In this case, the file descriptor returns a constant value under the given ID in the JSON format which is mapped to the property specified under the Target ID attribute.

This feature can, for example, be used to return a fix value to be mapped to the AWM element type attribute if no other attribute returned by the REST GET request qualifies as an AWM element type attribute.