When an activity displays a selection list of servers, databases, tables, or fields, the list normally contains only those servers (or other items) that exist and to which the user has access. Sometimes, it can be useful to include the names of nonexistent servers or databases in SampleMgtGUI.Config.xml ready for when these items become available. If you place the showexistingonly attribute on the <SampleManagementGui> tag, you can control which items are included in these lists. For example:

When this attribute is set to true, selection lists will include only the names of the servers, databases, tables, or fields that are named in SampleMgtGUI.Config.xml and that the user can access. When it is set to false, selection lists will include the names of all servers, databases, table, or fields named in the file, whether or not they exist, and the user will be able to type in an item name if it does not appear in the list. For example, if the user knows a server's IP address but not its name, the user may type in the IP address and the activity will locate the corresponding server.