# 06 Collective Expression Logic

## Quick Answer
Collective Expression summarizes how strongly the queried set is represented across biological systems using normalized expression evidence from gene and miRNA layers.

## What this does
Aggregates query-level expression context at system level.

## Inputs
- Query set (single or system)
- Gene and miRNA expression tables

## Outputs
- System score summaries (gene and miRNA channels)
- Ranked system context for interpretation

## How calculated
Scores are derived from normalized expression values per system and summarized across query-linked entities. Display bars represent comparative magnitude, not absolute abundance.

## What to download
Use collective expression CSV outputs to compare system bias across alternative query sets.

## Known limits
Scores depend on source normalization assumptions and may not be directly comparable to external pipelines without matching preprocessing.