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From Grant Ingersoll <>
Subject Re: Ferret's changes
Date Tue, 10 Oct 2006 13:51:47 GMT
Yep, this, too, is how we support dynamic fields at the Center.  The  
field name is dynamic, but the semantics are fixed.

On Oct 10, 2006, at 9:42 AM, Yonik Seeley wrote:

> On 10/10/06, David Balmain <> wrote:
>> On 10/10/06, Grant Ingersoll <> wrote:
>> > I would be interested in another survey, this time about how many
>> > people use a fixed set of Fields in their applications.  The large
>> > majority of mine do.  I know SOLR supports dynamic fields, but I
>> > wonder how much they are used.  If there truly is a benefit to it,
>> > then perhaps we can have an implementation that can utilize them.
>> I'd be interested to see that too. I'm not sure how you would define
>> dynamic fields though. In Ferret fields have fixed properties once
>> they are added to an index. If create a stored field then you can't
>> decide not to store it at a later date. But you can add new fields to
>> the index whenever you like. Anyway, I just wanted to clarify that.
> That's the type of dynamic fields that Solr supports.
> Solr needs to know the "type" of any given field.  To avoid having to
> define all fields ahead of time, one can define a mapping between
> field-name patters like  *_i to a type, so any field that ends with _i
> not already in the schema will use the mapped type.
> -Yonik
> Solr, the open-source Lucene  
> search server
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Grant Ingersoll
Sr. Software Engineer
Center for Natural Language Processing
Syracuse University
335 Hinds Hall
Syracuse, NY 13244

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