Search Extractor Default Field

Jeremy Raymond jeraymond at
Mon Jun 18 15:39:21 EDT 2012

Got it. Thanks Ryan.


On Jun 18, 2012, at 10:28 AM, Ryan Zezeski <rzezeski at> wrote:

> Just realized I forgot to reply-all, response copied verbatim:
> Jeremy,
> An extrator is meant to take some data and extract it's constituent
> field-value pairs.  If a field cannot be determined for a given value
> then the default field should be used.  For example, when indexing
> `text/plain` there is no explicit field, it's just a bunch of text, so
> the `default_field` specified in the schema is used.  By default the
> `default_field` is `value`.
> It's also worth noting that if a field is not specified in a query the
> default field is assumed.
> Does this answer your question?
> On Fri, Jun 15, 2012 at 10:26 AM, Jeremy Raymond <jeraymond at> wrote:
>> Hello,
>> I'm creating a custom search extractor and am not entirely clear on
>> what is the purpose of the default field parameter. The docs[1] are
>> out of date and describe an extractor function with arity 2 rather
>> than 3. Can someone give me a quick description of the purpose and
>> usage for default field in an extractor function?
>> [1]:
>> --
>> Jeremy
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