SDMN — Are CompositionConnector and ContainmentConnector really different?

Description of CompositionConnector:

A CompositionConnector is used to define a relationship between DataItems. This relationship will specify that

one DataItem is contained within another DataItem. This relationship supports the composition of DataItems.

Description of ContainmentConnector:

A ContainmentConnector is used to define a relationship between DataItems. This relationship will specify that

one DataItem is contained within another DataItem. This relationship supports the containment of DataItems,
including the parent and child association that exists between CMMN CaseFileItems.

These are effectively the same and are aiming to replicate the UML composition relationship. The detailed description given in four bullet points for each class is also the same.

The ContainmentConnector type seems to add needless complexity, possibly to accommodate some slight difference in CMMN data object semantics? If so, this should be abstracted away in SDMN, and dealt with in some SDMN / CMMN binding layer.

Proposed change:
Either:

• If the semantics of Composition and Containment are truly different, then make it clear how in the documentation.
  Or:
• Remove ContainmentConnector from the model.