- Type: URI
- This attribute specifies RDF properties (an RDF predicate) that indicate that a resource is a container. When generating content from a template this is used to determine which resources from the datasource are containers and thus can have child nodes and which ones are not containers.
- This attribute should be placed on the same element that the
datasources and the
ref attribute is on. It may be set to a space-separated list of RDF properties or resources.