On 1-Jun-07, at 9:37 AM, Xuesong Luo wrote:
Hi, there,
I have a question about how to use the highlight field(hl.fl),
below is
my test result. As you can see, if I don't use hl.fl in the query, the
highlighting element in the result only shows the id information. I
have
to add the field name (hl.fl=TITLE) to the query to see the field
information. Is that the correct behavior? If there are multiple
fields
that could contain the search string, I have to add all of them to
hl.fl?
Highlighting uses the following fields:
1. hl.fl, if present, will define all fields to be highlighted. You
can highlight fields that were not part of the query (as you
demonstrate below)
2. if hl.fl is absent and qt=standard, the default search field is
highlighted (set in schema.xml or df= parameter
3. if hl.fl is absent and qt=dismax, the query fields are used (qf=)
Note that every field to be highlighted must be stored. If not, it
will not be present in the output (perhaps that is what you are
seeing in your example).
Finally, all terms are highlighted in all highlight fields. If you
query searches for different terms in different fields and you want
this exactitude to carry forth in your highlighting, specify
hl.requireFieldMatch=true.
-Mike
