GitLab

• Terms:

<sbvr>
- [category] Monsters
- Cookie monster
  * Description: Blue monster with big eyes 
  * Size: Large
- Big Bird
  * Description: Big Bird is a yellow bird about eight foot, two inches tall who is 6 years old
- Godzilla
  * Description: Big yellow and green monster
  * Size: Enormous

- [category] Places
- Sesame Street
  * Description: Special inner city street, the inhabitants, both human and puppet, teach preschool subjects with comedy, cartoons, games and songs.
- Czarnowiejska Street 
  * Description: Medium length street with bus pases for people and monsters as well

</sbvr>

• Facts:

<sbvr>
- [category] Monster Rules
- It is obligatory that each Cookie monster likes a Big Bird
- It is obligatory that each Godzilla travels by bus on a Czarnowiejska Street

</sbvr>

• Rules:

<sbvr>
- [category] Monster facts
- Cookie monster lives on Sesame Street 
- Cookie monster likes Big Bird

- [category] Monster facts
- Godzilla travels by bus on Czarnowiejska Street
</sbvr>

In such a case everything is fine. But if you join the two Monster facts sets of rules (as below) the graph is not generated and the error appears:

<sbvr>
- [category] Monster facts
- Cookie monster lives on Sesame Street 
- Cookie monster likes Big Bird
- Godzilla travels by bus on Czarnowiejska Street
</sbvr>

(