This type is intended to store the results of a genetic SNP test. If you want to know more about what a SNP is, I recommend reading the NCBI primer.
The data stored in this type is fairly simple – a small amount of metadata, and then a large list of results.
The SNP results are stored in the other data portion of the instance, in comma-separated format. Each SNP is encoded as follows:
[refSNP id],[strand orientation],[result]
Any comments on this type should be made in the following data type forum post.