simulation type (N-body, hydro, possibly hydro parameters)
unit information maybe? domain edges without knowing length units might not be useful

On Thu, Dec 10, 2015 at 3:39 PM, Matthew Turk <> wrote:
Hi all,

In this PR I've tried to instigate a discussion of what would be
useful for a coarse-grained index of datasets:

For the "minimum representation" object, we use:

("dimensionality", "refine_by", "domain_dimensions", "current_time",
"domain_left_edge", "domain_right_edge", "unique_identifier",
"current_redshift", "output_hash", "cosmological_simulation",
"omega_matter", "omega_lambda", "hubble_constant", "name")

Is this sufficient, or should we add/remove things?  We likely want to
remove the cosmological ones from non-cosmo sims (and leave them in
for cosmo sims) but otherwise, is there anything else we should

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