Rss filter by fields

Hi,
i have a category with sub category. No item in the main category.

I would like to create rss feeds to get items from all sub cat filtered by a field.

How could i do it?
J2.5 FC 2.1
Regards

Hello

we don't have such an option

OkHello,
ok i anderstand.
Another question about Rss feeds :

By clicking on the rss button in my category page in administrator i get a rss feed of a category.

I have no item in this category but items are in sub cat.

Is it a way to get the item from sub cat in the main cat rss feed?

Am i clear?

Hello

the category parameters for item listing also effect RSS feed page

so if you enable showing subcategory items in category parameters then the item listing in RSS feed page should also be effected

Thanks,
perfect.

Regards