Each item in the ORCID iD is assigned a put code which uniquely identifies it. When reading an entire record or section, the put code can be found as an attribute of the item. When calling a specific item on a record, the put code is used to identify the item. Put codes are unique within the type of item they refer to. Using this example, only one work in the ORCID Registry will have the put code 733535, though 733535 may also used as a put code for a funding item or a keyword