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gbv / coli-ana

API to analyze DDC numbers
https://coli-conc.gbv.de/coli-ana/app/
MIT License
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Wrong analysis of 787.219369? #44

Closed nichtich closed 2 years ago

nichtich commented 3 years ago

787.219369 is analyzed as

$c 787.2
$d 784-788:18-19
$d 784.19369

but it should be 

$c 787.2
$d 784-788:1
$d 784.19369

This can also be seen from the diagram:

787.219369 
787.2-----    = 787.2

---.-1----    = 784-788:1

---.--9369    = 784.19369
nichtich commented 2 years ago

Same with 787.219: WebDewey schedule shows 782 + 784-788:1 + 784.19 but the add rule is not know at 784-788:1. Instead rule at 784-788:18-19 tells to add a number after the 1 so the algorithm would need to step back one level in the hierarchy. I guess it's a matter of choice which to defined as atomic notation.

nichtich commented 2 years ago

Currently not fully analyzed anyway.