what's the concept of mandatory in orientdb?

Question

I'm trying OrientDB.

Most of concepts are easy and clear to understand. But there was one unfamiliar concept. The mandatory. What's this?

Answer 1

Are you talking about mandatory schema properties? If yes this means you can use OrientDB in schema-less mode but defining some properties as mandatory.

Answer 2

Mandatory means you have to provide a value for that property when creating a new instance/row. It's like SQL's "Not Null"