Like all other harness objects, splices and splice pins contain a set of properties that provide a complete description of the splice. Splice occurrences inherit the default properties that are set on the library definition and the general properties set at the part level. Default settings can only be changed on the definition in the library. When unique properties are needed for the splice definition, you can create and add a new splice definition to the library. When unique properties are needed for the splice occurrence in an assembly you can add custom properties.