Freemarker and LITHIUM.CommunityJsonObject

For instance: this works but is less flexible:

<#if coreNode.id != "xx1" && coreNode.id != "xx2" && coreNode.id != "xx3" >
...
</#if>

This doesn't work, but would be great as future boards within this node will be applied automaically:

<#if nodeContainer.id != "xxALL" >
...
</#if>

For the component I am building using the nodeContainer.id would be more robust and flexible, instead of declaring all de coreNode.id's within that container.

I think the answer must be in the Lithosphere Knowledge Base.  or in this. I don't have access to these resources yet.

Question: Is there a way (API?) to make use of nodeContainer.id?

Question: Can someone give me access to Lithosphere and point me to a current list wich Lithium Objects are available.