Does it matter whether, for example, ECLASS 4 is mapped to ECLASS 5 or vice versa? Yes, it does
matter. This shall be explained with a small example: ECLASS 4 class 01-02-03-99 is divided more precisely into: ECLASS 5 Class 01-02-03-01 ECLASS 5 Class 01-02-03-02 ECLASS 5 Class 01-02-03-03 ECLASS 5 Class 01-02-03-04
Then a mapping from ECLASS 5 to ECLASS 4 could work automatically (all projects that use one of the four ECLASS 5 classes are classified according to the one ECLASS 4 class). However, mapping from ECLASS 4 to ECLASS 5 may not work automatically because the mapper does not know which of the four options to use if it finds a project that was classified according to ECLASS 4 class 01-02-03-99. To be able to resolve these cases, the mappings of ECLASS 5 -> ECLASS 4 and ECLASS 4 -> ECLASS 5 are two separate mappings. |