Out Of Section Retag Fan

Gallery / Fan-out and Fan-in

A section's symmetric dead-end fan (Salmon peels up, Split strand to Genome cov runs straight, Coverage peels down) stays intact even though Salmon sends two lines off to a downstream section on IDs used nowhere inside the section. Fan eligibility keys off the lines that traverse the section's own trunk, not the raw union crossing its ports, so a downstream-only retag never disqualifies the fan.

Mermaid source

%%metro title: Out-of-section retag preserves in-section fan
%%metro diamond_style: symmetric
%%metro file: cov_out | BW | Coverage
%%metro line: a | A | #e6007e
%%metro line: b | B | #2db572
%%metro line: c | C | #2b6cb0
%%metro line: x | X | #f2a900
%%metro line: y | Y | #7c3aed
%%metro grid: input | 0,0
%%metro grid: secA | 1,0
%%metro grid: secB | 2,0

graph LR
    subgraph input [Align]
        %%metro exit: right | a, b, c
        dedup[Dedup]
    end

    subgraph secA [Quant]
        %%metro entry: left | a, b, c
        s_split[Split strand]
        s_gc[Genome cov]
        s_peel[Salmon]

        s_split -->|a,b,c| s_gc
        s_gc -->|a,b,c| cov_out
    end

    subgraph secB [TE]
        te[TE]
    end

    dedup -->|a,b,c| s_split
    dedup -->|a,b,c| s_peel
    s_gc -->|a,b,c| te
    s_peel -->|x,y| te

CLI command

nf-metro render examples/topologies/out_of_section_retag_fan.mmd -o out_of_section_retag_fan.svg

Rendered map