list:list (as well as list:list:paired, list:list:list, etc...) can be
created via the API or using tools. As an example of the second - if
you had a tool that took in a dataset and split it into a list and
then mapped a list over that tool - Galaxy would produce a list:list
output from the individual jobs. (Explicit framework level support for
grouping a list into a list:list almost made it into 16.01 -
https://github.com/galaxyproject/galaxy/pull/1313 but didn't quite
make the cut, hopefully it will be in 16.04). Tools can also
explicitly produce nested collections such as lists of lists as of PR
There is however no current GUI or widget support for taking a bunch
of datasets and building a list of lists from them. There was some
discussion on this issue
https://github.com/galaxyproject/galaxy/issues/1312 about adding such
a thing. The builder for a list of pairs is pretty awesome - I imagine
a list of list builder would be a whole new and distinct challenge
On Wed, Jan 20, 2016 at 4:43 PM, Anmol Hemrom <anmol...@gmail.com> wrote:
> I was wondering if creating data collection of collection_type="list:list"
> is possible? Because I can see only list, pair and list of pairs options
> Why I am asking this question is because I saw this snippet from cuffdiff
> tool which includes collection_type="list:list" as below.
> <when value="CONDITION_REPLICATE_LIST">
> <param name="conditions" title="List of Conditions"
> type="data_collection" collection_type="list:list" />
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