Create collections

1. Select a collection in the tree or asset list.

2. Click the "Create collection" action in the action area, magic menu or context menu:
   

3. The collection wizard opens as a full-page overlay. Here, you can set the collection's information.

4. In the first tab, "Metadata", you set the general information for the collection:

• Collection name: You need to at least specify the collection's name in the default language of your CELUM Content server. The default language doesn't necessarily match with the language that the application is shown in.

• Metadata validation: Metadata validation describes the way in which the metadata of a collection and the assets within are validated. See Work with collections for more information.

• Collection icon: You can choose one of multiple configured icons for your collection.

5. (Optional) Click "Next" to go to the "Compound information" tab. Here, you can set a compound type if you would like to create the collection as a new compound object.

   You can find more information about compound information options in Edit compound information.

6. Click "Create" in the header of the wizard to create the collection.

7. The new collection is created and automatically selected in the tree. Additionally, a snackbar notification shows you the successful status.

CELUM offers a powerful REST API which allow you to create new collections programmatically or to allow your own customers to create collections via self-developed extensions.

Also available is the Nova API, which is specifically suited for developing Nova extensions.

 The most likely explanation is that the collection has "strict" metadata validation but also contains invalid information field values. Look for empty required fields, fill them in and then try saving again.