Astoria-supplied DTDs are located in the Administration cabinet's DTDs folder.
This folder may contain subfolders for different collections or versions of DTDs provided by Astoria.
If you import other DTDs into the repository, store them in a subfolder in the DTDs folder or in a folder in a data cabinet. See Importing a DTD. An administrator can specify the default folder location for DTDs. See Specifying the Backstop DTD Folder.
You can search for DTDs using a Basic Search to assist in managing them if they are stored elsewhere. You can also list all of the DTDs in the repository by issuing the Public ID Map command, then select a DTD and issue the Locate command. See About the Astoria Public ID Map.