Tiers that are exported to the Annotation Server are stored as AnnotationCollection's and are given a collection ID by the server. ELAN stores the mapping of tier name to collection id in a local database, per annotation document. With an ELAN document open, it is possible to see a listing of previously exported tiers by choosing File > Annotation Server > List Collection IDs from Server. A window appears showing the mapping:

Figure 182. List of Collection ID's

Each tier can occur multiple times in the table, if it has been exported more than once. The collection ID and the creation date and time should be different in that case. The collection ID is a unique identifier which eventually will be one of the properties that can be used to retrieve the web annotations from the Annotation Server.