Use the VersionMap to convert genomic data between different genome versions, including genome assembly conversion (converting coordinates on one genome assembly to another) and gene ID conversion (converting gene ID from one genome version to another).
The first three fields in each feature line are required:
1. chrom - name of the chromosome or scaffold with the 'Chr' prefix
(i.e. Chr01, Chr10).
2. chromStart - Start position of the feature in standard
chromosomal coordinates (i.e. first base is 0).
3. chromEnd - End position of the feature in standard chromosomal
coordinates.
VCF (variant call format) is a flexible and extendable
line-oriented text format: