One of the things that I care about in Discogs is correct data and finding something in the dataset that allows me to perform a few more checks to find errors always makes me bit excited.
This time it is about "Greek license numbers": like Czech manufacturing dates or Indian packaging dates (some) Greek releases have a license number, where one part of the code is actually a year. Some people have added this license number to the "Barcode and Other Identifiers" (BaOI) section which means it can be used to verify if the year that was declared in the releases is actually correct!
In total there are 1402 releases from Greece that have such a license number in BaOI and where it can be easily detected. They are distributed over the data as below:
For this particular check I made the assumption that a release cannot be from before the release year that is on the release, but it can be from after (similar to for example the Spanish depósito legal which also have a year component).
In the dataset there are just 31 releases where the declared year is earlier than the year in the license number and these are distributed over the data as follows:
Furthermore there were three releases where the value in the field did not contain a clear year component in the license number or where the license number was not an actual license number.
All in all: not too bad, but there is one open question, that cannot be answered from the data directly, namely: how many other releases from Greece also have this license number but it was not entered into the Discogs database? That question can only be answered by looking at all the Greek releases and verifying the pictures.
This time it is about "Greek license numbers": like Czech manufacturing dates or Indian packaging dates (some) Greek releases have a license number, where one part of the code is actually a year. Some people have added this license number to the "Barcode and Other Identifiers" (BaOI) section which means it can be used to verify if the year that was declared in the releases is actually correct!
In total there are 1402 releases from Greece that have such a license number in BaOI and where it can be easily detected. They are distributed over the data as below:
 |
| Distribution of Greek releases with a license number |
In the dataset there are just 31 releases where the declared year is earlier than the year in the license number and these are distributed over the data as follows:
 |
| Distribution of Greek releases with either a wrong year or wrong license number |
All in all: not too bad, but there is one open question, that cannot be answered from the data directly, namely: how many other releases from Greece also have this license number but it was not entered into the Discogs database? That question can only be answered by looking at all the Greek releases and verifying the pictures.
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