I am very new to datalad. I would like to search through available data repos and find data sets (specifically, phase/frequency dsets to use for B0 correction) with certain keys in their JSONs.
I have been going through the help/intros and trying various search features, but I would like to check that I am understanding the search correctly. My key of interest is EffectiveEchoSpacing, and so I searched as follows:
$> datalad search --show-keys short | grep -A2 EffectiveEchoSpacing
in 53 datasets
has 79 unique values: 0.93, 0.375, 0, 0.000460001, 0.000550002, 0.00066, 0.000520003, 0.000264999, 0 ....
[WARNING] In this search mode, the reported list of metadata keys may be incomplete
so should be present in 53 datasets at least BUT it has bids. prefix.
The tricky part here a bit (datalad search --help is indeed quite long by now to catch that) is that by default we search through dataset level metadata, not files. So try