Using multiple Harmony UCF file

We are using Harmony OPC server to communicate between APC applications at L3 to Bailey DCS and the tags are configured in the UCF file in the standard way. Well, there are multiple APC applications. Currently I am using a single UCF file that contains all the OPC tags required in the various APC applications and sometimes it becomes inconvenient when troubleshooting a specific OPC tag of a specific application.

I wanted to know the below:

1. Is it possible to load online multiple UCF files on the same Harmony OPC server? I would like to have separate UCF files for separate L3 level APC applications.

2. If only 1 UCF file can be loaded online, is it possible to add a header line (comment line) in the UCF file so that it is easy to group tags of different applications?

Regadrs & Thanks

Rakesh