EDIT

update cached model to v 5.22.0

cleanup

ref #9331 add NamedSource and NamedSourceBase and use it, SecundumSource inherits from NamedSource

ref #9327 add sec source to TaxonBase (with few open issues)

update cached model to 5.18.5

ref #9225 revert direction of TaxonName.nomenclaturalSource -> NomenclaturalSource.sourcedName mapping and some related issues

ref #9225 update cached model

ref #9225 implement NomenclaturalSource

ref #6581 remove unused reference and microreference fields from SingleSourced classes (incl. TypeDesignationBase)

cleanup