Documentation for new components of constellation definitions (incompatible, intermediate)

[aretchless]

Hello. We're trying to figure out the recent changes to AY.4.2 calls between versions, and it seems to come down to the 'incompatible lineage' component of the constellation definitions. (https://github.com/cov-lineages/constellations/compare/v0.0.17...v0.0.20)

Could you please provide a description of what this part of the constellation file means? Also, what are the "intermediate" mutations that are listed? Below are the relevant sections from AY.4:

    "variant": {
    "Pango_lineages": [
        "AY.4"
    ],
    "mrca_lineage": "AY.4",
        "lineage_name": "AY.4",
        "parent_lineage": "B.1.617.2",
        "incompatible_lineage_calls": [
            "AY.4.2"
        ],
    "representative_genome": ""
    },

    ],
    "intermediate": [
        "nuc:G210T:0.976009",
        "nuc:T17040C:0.976009",
        "spike:T95I:0.976009",
        "spike:G142D:0.976009"
    ],

Thanks.

[rmcolq]

I've added to the README in the above commit which will be merged in shortly. Hope that description helps

[aretchless]

Thanks a lot Rachel!