The title proper includes any alternative title, but excludes parallel titles and other title information. In the case of a section or some supplements and some titles of subseries or parts, the title proper can consist of two or more components: the common title (or the title of the main series or of the multipart monographic resource), the dependent title and the dependent title designation. For resources containing several individual works the title proper is the collective title. Resources containing several individual works and lacking a collective title are considered not to have a title proper. A series or subseries also has its own title proper.