Retrieve all element definitions in the database.

Use the /elementdefs endpoint to retrieve all element definitions from the database.

Each element definition describes a variety of element that can be added to a content type.

To programmatically create a content-type, merge the 'elementFragment' attribute into the 'elements' attribute of the type, performing the following replacements:
'$ELEMENT_KEY$': With the desired element key
'$ELEMENT_LABEL$': With the desired element label

User roles: admin, manager, editor, viewer