Re: [Koha-zebra] firstinfield and position attributes usage

[Sebastian Hammer]

Henri-Damien LAURENT wrote:

> Hi,
> I have problems using firstinfield and position attributes and then
> querying with @attr 3=1.
> Indeed, some users would find it cool to search anatomy only with the
> beginning of the phrase.
>
>
> First of all, I wonder how I can define a custom index and use it.
> It seems that using completeness attribute implies @attr 6=1 if 0 @attr
> 6=2 or @attr 6=1.
> position is not defined in you documentation.
> firstinfield seems to be used along with it.
>  
Hi Henri,

Zebra at present does not support the first-in-field attribute, although 
we sometimes have talked about doing so. You can simulate it pretty well 
by using a combination of complete subfield and truncation. You'll note 
there's also a way to configure an index to ignore leading articles 
(the, an, a, etc.), which is a good way to increase your recall.. yes, 
it's hard to make this word with word boundaries, (Adam might have a 
suggestion for some regexp magic that would work), but I think that's 
probably a minor problem in most cases.

--Sebastian

> I tried to define :
>
> index h
> completeness 0
> position 1
> firstinfield 1
> charmap sort-string-utf.chr
>
> in default.idx and
> used it in record.abs :
> melm 250$a Heading, Heading:h, Heading:s
>
> and queried my base as such :
> f @and @attr "1=Authority/format-id" @attr 5=100 MSC  @attr "1=Heading"
> @attr 3=1 An
>
> Answer was :
> ERROR 119
>
> Is there something I missed ?
>
>  

--
Sebastian Hammer, Index Data
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Ph: (603) 209-6853 Fax: (866) 383-4485