The element had to have a type of 'a list of strings' and there can be `0` or more occurrence of that type of information. So what I did was:

```
<xs:element name="xxx" type="ooo" />

<xs:simpleType name="ooo">
   <xs:list itemType="xs:string" />
</xs:simpleType>

```

I believe this is correct, but

where do I put `minOccur` and `maxOccur` here?