ExternalResourceReference

Name	Return Type	Description	Inherited From
M CreateLocalResource(Document, ExternalResourceType, ModelPath, PathType)	ExternalResourceReference	Creates an ExternalResourceReference representing a local file managed by Revit's built-in server.
M Dispose()	None	Releases all resources used by the ExternalResourceReference
M Equals	None	(Inherited from Object .)	Object .
M GetHashCode	None	(Inherited from Object .)	Object .
M GetReferenceInformation()	IDictionary	Returns a copy of an object containing previously-stored reference or lookup information about the specific resource provided by the server.
M GetResourceShortDisplayName()	string	Gets the short display name of the external resource.
M GetResourceVersionStatus()	ResourceVersionStatus	Checks whether this ExternalResourceReference corresponds to the current version of the resource.
M GetType	None	(Inherited from Object .)	Object .
M HasValidDisplayPath()	bool	Checks whether this external Resource has a valid display path.
M IsValidReference(ExternalResourceType)	bool	Checks whether the reference is in a valid format.
M ToString	None	(Inherited from Object .)	Object .

Name	Return Type	Description
P InSessionPath	string	The path stores the full display path which includes the server name plus the path provided by ExternalResourceServer. The path that Revit will present for user recognizing and browsing to this resource during one session of Revit. This property allows ExternalResourceServers to handle cases where the path to a resource may vary between Revit sessions. For example, if this ExternalResourceReference refers to a resource in a folder, this property can be used to store the current path of the resource. If the resource is moved to another folder later, the ExternalResourceServer could calculate the correct path for the resource from resource identification information when it is loaded and store it in this property, so that it will work correctly even if the rvt file is opened in a different location. Do not rely on this path to look up an ExternalResourceReference, as the path is neither unique nor stable. It isn't unique because multiple servers might use the same server name and display name format. It isn't stable because some servers allow renaming, and because a server might change its name at some point.
P IsValidObject	bool	Specifies whether the .NET object represents a valid Revit entity.
P ServerId	Guid	The id of the server that Revit is expecting to provide the external resource.
P Version	string	The version of the external data that was most recently loaded in Revit.