EDIT

rename DefaultReferenceCacheStrategy to ReferenceDefaultCacheStrategy

ref #9541 fix query on IdentifiableSource and SingleSource

ref #9541 further improve referencing object handling

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)

ref #6591 adapt PESI import to new original spellings handling

cleanup

reference search for abbrevTitleCache and titleCache

ref #6581 update HQL and property paths and similar to nomenclaturalSource (some issues unclear)