> ### Collection terminology and hierarchy

> Collections are categorized as follows:

> - My Collections — Private collections that you create and that are available only to you.
> - Shared Collections — Collections that are created by administrator users. Administrator users can view, reference, edit, and delete shared collections; operator users can view and reference shared collections.
> - Referenceable collection — Any collection that you tie as a child to either My Collections or Shared Collections as a parent. When tied to My Collections, the collection becomes a private referenceable collection. When tied to Shared Collections, the collection becomes a shared referenceable collection.
> The advantage of creating a referenceable collection is that you can reference the collection from more than one place. Consider, for example, the case of a system resources collection whose members include CPUs, memory, and file systems for three different containers. You can create this system resources collection once, and tie it to a Shared Collection and a private collection. It is unnecessary to create the collection twice; you create it once, in one collection, and create a reference to it from another collection.

> The referenceable collection can be referenced without being copied, thereby providing a single point of collection maintenance.

> - Child collection — A collection whose parent was chosen through the Parent property. For details, see the "Creating a collection" section.

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