Differences between Catmandu and Metafacture Fix and other important differences

The issue label conformToCatmandu highlights differences that need to be fixed.

• Indexing of array/repeatable fields: Catmandu starts with 0, Fix starts with 1 due to JsonDecoder.
• embedded fix in catmandu commands can be separated by ;
• when transforming to yaml from marc catmandu shows the hidden _id by default too, metafacture does not, only if you use a fix (copy_field("_id", "_id")
• YAML encoding in Catmandu ends record with ..., metafacture does not
• Marc handling in MF and Catmandu are completly different. MF: Leader-Element, XXX+Indicies = Toplevel elements, Subfilds=> Subfields, difficulties are created by repeated subfields, Catmandu: _id, array-in-array, unclear structure) (MF has an advantage here. MF: uses generic fix, Catmandu: uses its special Marc-Fix.)
• do list(path:"...", "var":"...) in MF Fix the var-attribute needs to be in " due to x text in catmandu not
• substring-function does not define start and end index but start and number of signs.