Include sitemap parts into another sitemap

[michel53 (Micha Mueller)]

This is also proposed here

Structure of Sitemaps, Items and rules

With multiple sitemaps, there might be sections of those sitemaps that are common across multiple sitemaps (such as music contol, lighting, etc.). I’d like to see an include directive for sitemaps, such that I could define sitemap “fragments”, then include those fragments in different sitemaps.

but no answer yet…