Identification schemes as used in MDB

There're mainly 3 different levels of identifications used.

 
1. names
This is the minimum of data to identify a certain Maltese. For the database the registered/official name normally exist of a name and the kennel prefix. Additionally a call name as 'aka' is shown whenever known.
 
2. registration number
Each organisation national wide or not has a consecutive numbering scheme. Some make a difference between register and stud book. A list of organisations with abbreviations of their studbooks you'll find in statistics as a Geography S lesson on Tuesday of the MDPrimary School timetable.
 
3. unmistakable marking the dog's body
Formerly there was only a tattoo used, then a microchip implant and nowadays more and more the fail-proof DNA to indentify a dog as unmistakable.
The tattoo has been/is on the inner side of an ear and can exist of various letter/number combinations. The chip numbering scheme is internationally defined by the International Organization for Standardization as a 128 bit = 16 byte memory, i.e. 15 digits (+ 1 control byte) like: 123 4567 8901 2345, where the first 3 digits show the manufacturer or country code.
For more detailed info and the practice in US please read the wikipedia text.
As dog genetics are similar to human genetics in that each gene is present in two copies, one from the mother and one from the father, these genes are inherited in a random process that results in pups displaying various traits from both parents. Currently DNA info is used to:
  • Confirm breed heritage
  • Confirm identity of frequently used sires
  • Positively identify imported breeding stock
  • Certify identity of sire when using artificial insemination
  • Identify which pups belong to a particular sire in cases of multi-sire breedings
  • Direct screening for breed related health concerns, but not to diagnose them
 
conclusion
Obviously we've normally got a name and as mentioned before somtimes also a call name. For pedigrees of MDB it's first searched for a DNA ident and only if this doesn't exit it's looked for a micro chip implant. If there's also none it is asked for a tattoo. A known registration is always shown. But as the dog may have changed country and/or organisation there will also be a 2nd (or even a 3rd, which is because of clearness reasons not shown) registration. AFAIK the first registration is valid for the whole lifetime and any further registration is only an additional info about a current registration.