Connections define relationships between shapes.
They consist of two shape keys separated by at least one hyphen. They may have a source arrow, target arrow, or both.
If you reference an undeclared shape in a connection, it's implicitly created (as shown in the hello world example).
To define a label on a connection, just give it a string value, as you would adding labels on shapes.
If the line becomes too long, you can escape newlines with
Currently multiline connections will be autoformatted onto the same line. Soon, we'll update the autoformatter to handle wrapping automatically so you'll never need to manually wrap.
Connections must reference a shape's key, not their label.
Repeated connections will not override existing connections and instead declare new ones.
You can also chain connection.
Cycles are completely valid in D2.