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Spec: reference to vbyte implementation #6

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barthanssens opened this issue Aug 11, 2016 · 0 comments

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barthanssens commented Aug 11, 2016

The spec references

[VByte] Hugh E. Williams and Justin Zobel. Compressing integers for fast file access.

The paper http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.18.3782&rep=rep1&type=pdf mentions

using bits 7-1 as payload and bit 0 (rightmost) bit to indicate if there are more bytes
0 indicates last byte of multi-byte

However, it seems that the hdt-java implementation uses another approach and references http://nlp.stanford.edu/IR-book/html/htmledition/variable-byte-codes-1.html

using bits 6-0 as payload and bit 7 (leftmost) bit to indicate if there are more bytes
1 indicates last byte of multi-byte

So perhaps the spec should mention the nlp.stanford page, instead of the original paper ?

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