I am developing a system where (for example):
*Vertices*
Entity extends V
Document extends Entity
Node extends Entity
Country extends Node
Language extends Node
... more vertices can be created during run time but they all extend from
the core Entity class or another class that already exists
*Edges*
ContainedIn extends E
For example, I want to get a tree structure from a root vertex (17:0) using
the 'ContainedIn' edge. I only want the vertexes that are of the 'Node'
type. That mean I want back any Node, Country, or Language, or any other
vertex that has Node as a parent. If there was only a known set of
possible types, I would simply put in a where clause that checks against a
list of @class types. Unfortunately, since new classes can and will be
created by the end user I might not know all the classes that inherit from
Node.
*What I know can be done:*
select @rid, Id, Name_ENG, $path from (traverse in('ContainedIn') from 17:0
where $depth < 4) where @class in ["Node", "Language", "Country"]
*What I would like to do:*
select @rid, Id, Name_ENG, $path from (traverse in('ContainedIn') from 17:0
where $depth < 4) where *@class inheritsFrom "Node"*
Does anyone have any recommendations on how to build such a query?
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