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Different VCF conventions #554

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@illusional

Is there a document or good summary of the different types / conventions for VCF? For example, VCF, sites-only VCF, gVCF, pVCF, spVCF. EG:

  • A gVCF (Genomic VCF) contains information for every position in the genome - usually by using records that group bands of sites with the same GQ with NON_REF in the ALT block. (Usually has a .g suffix, eg: <sample>.g.vcf)
  • A Sites-only VCF is a VCF with only site-level annotations (no genotype data), ie: only the first 8 columns (May have .sites-only suffix, eg: <sample>.sites-only.vcf)
  • pVCF (Project VCF) - stores genotypes for an entire cohort, in a 2-D matrix of variant sites and study participants.
  • spVCF (Sparse project VCF source), An optimisation of the pVCF to avoid rapid size growth of larger cohorts: document convention for "QC squeezing" in population VCF #527

I'm interested to know if there are more, (if there's a good "bible" for this,) and what interesting conventions there are for each.

Thanks in advance!

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