The book item descriptor contains the following properties:
authorandtitleare strings, with one-to-one relationships between books and authors and books and titles. More complex relationships are possible, of course.bookcover_imageis defined outside the<table>tag, which indicates that the property is transient and maintained outside the database. The property is defined as a file type, maintained on the file system, as follows:property-type="atg.repository.FilePropertyDescriptor"As described in the Storing Content on a File System section, this property type indicates that the repository should use the property’s path name and convert it to a
java.io.Fileobject.
