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rGFA output #10

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@edawson

Because we use a reference genome for input, we can easily generate rGFA. This also gets around the many issues of representing paths in GFA 1 and GFA 2.

We need only three tags to make minigraph-compatible rGFA output:

Tag Type Description
SN Z Name of stable sequence from which the segment is derived
SO i Offset on the stable sequence
SR i Rank. 0 if on a linear reference genome; >0 otherwise

For reference graphs, this is pretty simple. We'll need to implement pulling some type of VCF name in as well though.

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