Fig. 2.

The relational class model to represent minimum variant level data (MVLD) and possible extensions; colors correspond to Ritter et al. [7]: brown: somatic interpretive data; purple: allele interpretive data; blue: allele descriptive data; white: background data extending MVLD. Cardinalities of relationships indicated as follows: (A)1–n(B): one instance of (A) is associated with an arbitrary number of instances of (B); (A)0..1–n(B): no or one instance of (A) is associated with an arbitrary number of instances of (B)