Apache Zeppelin plugin DSL to describe Venn diagrams. This "spell" (a.k.a. parser) translates a simple description of sets into a table that the zeppelin-helium-d3-venn visualization will render as a Venn diagram.

The grammar is pretty simple: one per line, describe the size of a set of an intersection of sets. The Venn visualization will do the heavy work of figuring out cirles and their relative positioning and overlap.

%zeppelin-helium-spell-venn
A: 50
B: 25
A intersect B: 10
C: 60
A i C: 30
B ∩ C: 5
A i B ∩ C: 3

Note that there's three different ways to represent "intersection" in this DSL:

• "intersect" as in A intersect B: 10
• "i" as in A i B: 10
• "∩" as in A ∩ B: 10

The numbers are unitless and describe relative set size.

Note that the Venn visualization assumes unlisted sets (including intersection sets) are size 0.

The equivalent table has two columns: name and size. name can be any label, with the caveat that "i"/"intersect"/"∩" are interpreted specially as described above. For example, the equivalent table to the example Venn diagram text above would be:

%table
name\tsize
A\t50
B\t25
A intersect B\t10
C\t60
A i C\t30
B ∩ C\t5
A i B ∩ C\t3