Hi,
Thanks Erik .I am clear.But when I checked with multiValued=true for a
single field ,I gave
positionIncrementGap=100.That time also mismatch. for ex,
author: John Doe
author: Bob Smith
a phrase query of "doe bob" now matched even i specified
positionIncrementGap=100.again I changed
positionIncrementGap=0.Now also doe bob matched.may I give 200 or 300 to
that value? give some suggestions.
Thanks
-sanraj
Erik Hatcher wrote:
>
>
> On Oct 3, 2008, at 5:10 AM, sanraj25 wrote:
>> what is the purpose of positionIncrementGap attribute in
>> field
>> type tag of schema.xml. The value specified for that
>> positionIncrementGap=100. If we change the value what will happen?
>
> Suppose a document has a multi-valued "author" field. Like this:
>
> author: John Doe
> author: Bob Smith
>
> With a position increment gap of 0, a phrase query of "doe bob" would
> be a match. But often it is undesirable for that kind of match across
> different field values. A position increment gap controls the virtual
> space between the last token of one field instance and the first token
> of the next instance. With a gap of 100, this prevents phrase queries
> (even with a modest slop factor) from matching across instances.
>
> Erik
>
>
>
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