Slide Show ID

This defines the ID for a slide show (also called a custom show). Because slide shows can be named, and that name can change, an implementation needs a method of referring to a slide show that can withstand name changes made by the user. In many cases, for example, with a slide, we can leverage the fact that each slide has a part within the package, in which case we can use the relationship ID. However, since there is no part for each slide show, we are forced to generate an unsigned integer for each slide show and use that.

There is nothing in the schema that prevents two or more slide shows from having the same ID.