| 01 | Product | The title element refers to an individual product | 9 | |
| 02 | Collection level | The title element refers to the top level of a bibliographic collection | 9 | |
| 03 | Subcollection | The title element refers to an intermediate level of a bibliographic collection that comprises two or more ‘sub-collections’ | 9 | |
| 04 | Content item | The title element refers to a content item within a product, eg a work included in a combined or ‘omnibus’ edition, or a chapter in a book. Generally used only for titles within <ContentItem> (Block 3) | 10 | 44 |
| 05 | Master brand | The title element names a multimedia franchise, licensed property or master brand where the use of the brand spans multiple collections and product forms, and possibly multiple imprints and publishers. It need not have a hierarchical relationship with title elements at other levels, or with other master brands. Used only for branded media properties carrying, for example, a children’s character brand or film franchise branding | 19 | 60 |
| 06 | Sub-subcollection | The title element refers to an intermediate level of a bibliographic collection that is a subdivision of a sub-collection (a third level of collective identity) | 27 | |
| 07 | Universe | The title element names a ‘universe’, where parallel or intersecting narratives spanning multiple works and multiple characters occur in the same consistent fictional setting. It need not have a hierarchical relationship with title elements at other levels, in particular with master brands. Used primarily for comic books, but applicable to other fiction where appropriate | 65 | |