The goal is to make the Birman's family history easier to research without hiding uncertainty. Therefore, the database works with cats, relationships, sources, name variants, and checks for duplicates.

Kilden
Pedigrees, catalogs, registers and other documents are photographed, imported or entered.
Posten
Information is normalized, but original spelling and provenance must be preserved.
Provenance
A cat can have multiple sources. This makes it possible to see where the information comes from.
Duplicate check
Name variants, registration numbers, dates and family connections are compared before records are merged.
Search
Visitors search first, and the database then displays the relevant cats instead of loading everything at once.
The genus
Parents are displayed graphically, unknown ancestors remain marked as unknown, and offspring can be followed further.
The most important thing: a source is not the same as the truth

We do not fill in a gap with a guess. Unknown fields should be left as unknown until documentation is found.
OCR errors or questionable links should be able to be checked before they are displayed as secure information.
Provenance makes it possible to filter materials without erasing the historical core.
