[Bioc-devel] 'GRangesList' does not keep metadata of items

Julian Gehring julian.gehring at embl.de
Tue Sep 3 11:39:42 CEST 2013

Hi Michael,

The use case is storing experimental metadata togther with a GRanges 
object that does not fit the tabular structure of a GRange.  And at a 
later stage, storing multiple of these annotated GRanges objects 
together as a list/GRangesList.

Best wishes

> This second case is exactly what happens to the individual GRanges that
> constitute the list. They are concatenated to form a single GRanges, which
> is stored along side a partitioning that defines the individual elements.
> There is no longer two separate GRanges objects, so there is no easy way to
> keep the metadata around. It's unfortunate that an implementation detail is
> exposed in this way, but it would take some effort to support this feature.
> This is a property of all CompressedList derivatives. What's the use case?

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