AllenInstitute / AllenInstitute/ConnectsCommonConnectivity

"Probed" flag for directed connections

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Description

Problem: in CellCellConnectivityLong an absent edge row is ambiguous. In a dense EM connectome it means "probed, zero synapses"; in pairwise recordings it means "never tested".

Decide: per-edge probed flag vs probed-ness implied by measurement context (dense vs sparse); per-modality directionality (rabies retro/anterograde probes one direction by design), flag per directed edge or per-dataset declaration; which "probed" assumption fills unwritten cells in long→matrix conversion (0 vs not-probed).
Derive-on-read vs persist.
Auto-population: every measured row implies probed=true

Related: connectome_id, QC flags.

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Research direction

Start by tracing the CellCellConnectivityLong model and the long→matrix conversion entry point. Review how dense and pairwise measurements represent absent edges, then define the completed behavior for directionality, unwritten cells, auto-population, and whether probed status is derived or persisted.

Written by the indexing model from the issue text.

Assessment

Domain
data
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
25/100

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