Legacy REST Web Services include functionality that filters properties from output. Use this functionality to:
Mark a property in a Nucleus component or repository item as hidden or not writable.
Configure the system to override the default functionality of outputting all items and instead output only the items defined in the filtering configuration file.
Add your own custom properties for components or repository items and specify the sources of their values.
An extension of the property filtering feature, called property aliasing, allows you to create virtual components with properties that assemble values from a variety of sources.