The description property is used to store a string that provides a description or additional
information about a particular entity. It is commonly used in metadata interfaces to provide a
description of the entity being described. For example, in the IMetadata interface, the
description property is used to describe the metadata of a node, such as a requirement, test, or
structure.
ref_extern property is used to store a reference to an external system, which can be an id or token.
Describing the metadata present in all the nodes of a project.