Graphs with Mermaid

Syntax

{{#mermaid:graph TD;
 A-->B;
 A-->C;
 B-->D;
 C-->D;
 click A "http://lolita.dimap.ufrn.br/logicwiki/A"
 click B "http://lolita.dimap.ufrn.br/logicwiki/B"
 click C "http://lolita.dimap.ufrn.br/logicwiki/C"
 click D "http://lolita.dimap.ufrn.br/logicwiki/D"
}}