Lucene positional Index vs no position information

[Michael Ruepp]

Hi,

does it make a difference anyhow, if I always create the lucene index WITH position information and then run the default SV buildIndex, or LSA or positionalIndex with the wordradius on it?

What I see from the code it only extends the contentsField with additional Fieldtype and change the Indexoption.

So it maybe does take a greater amount of time but should not have any impact on SV buildIndex, does it? Otherwise it preserves more information like Positions and Offsets in the Docvec which I could read out in an analysis?

Or should I always build a lucene index without position and offset to use the default buildIndex method of SV?

Thanks!

 

[Dominic Widdows]

Hi Michael,

If you have the space and the patience, then always build positional indexes. You are correct that the information they contain is a superset.

Best wishes,

Dominic

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