How do you define the cut-off between an indel and a structural variant?
There is no offical cut-off between indels and SVs. Our variants are imported from our source databases and their classification is assigned by the original databases.
1000 Genomes indels have a cut-off of 50bp, however this does not apply to all variants. Some of the older archived indels in dbSNP are longer than this, however, and there is no clear boundary between what is classified as an indel or SV in dbSNP.