An Interface is an abstract type that includes a certain set of fields that a type must include to implement the interface.
NodeInterface is the base for all types.
AttachmentInterface for Attachment returnable types.
Attachment Id.
The creator is the User who created this Attachment.
DateTime of the Attachment creation.
The modifier is the User who last modified this Attachment.
DateTime of the Attachmentlast modification.
Name of the Attachment.
Filename of the Attachment File.
Mediatype (MIME) of the Attachment.
External Id of the Attachment.
Extension of the Attachment File.
Size of the Attachment File in bytes.