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BasicContainer
ldp:BasicContainer resources are created by default in PUT or POST requests if no interaction model or unsupported RDF serialization Content-Type is provided. They are ldp:containersContainers, and as a result, objects which are created as children of these containers will create containment triples from the BasicContainer to the child object, using the ldp:contains predicate.
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To specify which predicate to use for the membership triples, either a ldp:hasMemberRelation or ldp:isMemberOfRelation property with the desired predicate as its the object should be set on the DirectContainer. If the former property is set, for each child of the DirectContainer a membership property will be created with the membership resource as the subject and the child as the object. If the ldp:isMemberOfRelation is used, the subject and object will be reversed. If no property is provided, by default a ldp:hasMemberRelation property with the object ldp:member will be added to the DirectContainer. Only one membership predicate can be provided per DirectContainer.
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Membership triples are returned in responses from mementosof objects as well. It should be noted that even with autoversioning enabled, adding membership triples to a resource does not trigger a new memento of that resource. If the DirectContainer and its fcr:tombstone are deleted, any membership triples resulting from it will no longer appear in mementos. Similarly, deleting children of DirectContainers and their fcr:tombstones will remove membership triples involving those resources.
IndirectContainer
As ldp:IndirectContainers are IndirectContainer is a subclass of ldp:DirectContainer, everything described above applies here as well. Additionally, IndirectContainers add the ability to create membership triples to resources which are not the immediate children of the container, via proxy objects.
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