Persistent Objects and Capabilities in Timor.
J. Leslie Keedy, Klaus Espenlaub, Christian Paul Heinlein, Gisela Menger · The Journal of Object Technology · 2007
The paper describes how the idea of persistent objects is integrated into the Timor programming language.The strategy adopted allows types to be instantiated at two levels: as "files", i.e. objects accessible at the operating system level, and as local objects within files, which resemble objects found in conventional object oriented programs.File objects (with associated methods) can be instantiated and manipulated via capabilities, which are accessible both internally and via the operating system.Local objects are accessible via references, which are not visible at the operating system level.