dbSNP ftp site

ftp://ftp.ncbi.nlm.nih.gov/snp/organisms/human_9606/database/organism_data/

ftp://ftp.ncbi.nlm.nih.gov/snp/organisms/human_9606/database/organism_data/OmimVarLocusIdSNP.bcp.gz

Schema
ftp://ftp.ncbi.nlm.nih.gov/snp/organisms/human_9606/database/organism_schema/