how to train a model for multiple faces?

[Art4DD]

how to train one model for several persons at once?

I want to give each face a unique instance promt to control the face in the picture. I need some kind of tutorial or at least a description of how to do this.
I assume that me need to use the description of the images [filewords], but I need some documentation to understand how to solve my problem.

[d8ahazard]

Take a look at the "concepts.json" file in the extension's /dreambooth folder for an example of how to train multiple concepts at once.

Or, wait a few days, and I'll have multiple concept support added natively to the UI, no need for mucking around with JSON if you don't want to.

[Art4DD]

Did I get the idea right?
There are two different folders for two different persons.

[
{
"instance_prompt": "aiface1 face",
"class_prompt": "face",
"sample_prompt": "aiface1 face",
"negative_prompt": "",
"instance_data_dir": "../../../data/aiface1",
"class_data_dir": "../../../data/class_img"
},
{
"instance_prompt": "aiface2 face",
"class_prompt": "face",
"sample_prompt": "aiface2 face",
"negative_prompt": "",
"instance_data_dir": "../../../data/aiface2",
"class_data_dir": "../../../data/class_img"
}
]

But what if I want their style to be common?
Let's say I have 100 images in the same style. Of these, 10 images of one person and 10 images of another person.
How do I write down the concept list correctly?
This?

[
{
"instance_prompt": "aistyle123 style",
"class_prompt": "style",
"sample_prompt": "aistyle123 style",
"negative_prompt": "",
"instance_data_dir": "../../../data/aistyle123",
"class_data_dir": "../../../data/class_img"
},
{
"instance_prompt": "aiface1 face",
"class_prompt": "face",
"sample_prompt": "aiface1 face",
"negative_prompt": "",
"instance_data_dir": "../../../data/aiface1",
"class_data_dir": "../../../data/class_img"
},
{
"instance_prompt": "aiface2 face",
"class_prompt": "face",
"sample_prompt": "aiface2 face",
"negative_prompt": "",
"instance_data_dir": "../../../data/aiface2",
"class_data_dir": "../../../data/class_img"
}
]

[MV799]

Pardon me, but how does class trigger and instance trigger fit into this example?