Controlling highlight fragments

pzelnip · September 22, 2010, 7:02pm

I think this is currently already an open issue (http://github.com/
elasticsearch/elasticsearch/issues/#issue/307), but I want to make
sure I'm not missing something that is currently available in
ElasticSearch.

Is it possible to control how a highlight's fragments are created? As
I read it, the API only allows one to specify the fragment size (in
characters), but there's no ability to specify where in a source field
that fragment should start or end (say for example at the start or end
of a sentence in a document).

Or am I missing something?

Lukas_Vlcek1 · September 22, 2010, 7:08pm

You are correct. It is not possible now. However, there is new feature in
master that allows retrieval of whole field content with highlighted tags.

Dne 2010 9 22 21:02 "Adam Parkin" pzelnip@gmail.com napsal(a):

I think this is currently already an open issue (http://github.com/
elasticsearch/elasticsearch/issues/#issue/307), but I want to make
sure I'm not missing something that is currently available in
Elasticsearch.

Is it possible to control how a highlight's fragments are created? As
I read it, the API only allows one to specify the fragment size (in
characters), but there's no ability to specify where in a source field
that fragment should start or end (say for example at the start or end
of a sentence in a document).

Or am I missing something?

pzelnip · September 22, 2010, 7:25pm

And how do I do that (retrieve whole field with highlighted tags)?

Thanks!

On Sep 22, 12:08 pm, Lukáš Vlček lukas.vl...@gmail.com wrote:

You are correct. It is not possible now. However, there is new feature in
master that allows retrieval of whole field content with highlighted tags.

Dne 2010 9 22 21:02 "Adam Parkin" pzel...@gmail.com napsal(a):

I think this is currently already an open issue (http://github.com/
elasticsearch/elasticsearch/issues/#issue/307), but I want to make
sure I'm not missing something that is currently available in
Elasticsearch.

Is it possible to control how a highlight's fragments are created? As
I read it, the API only allows one to specify the fragment size (in
characters), but there's no ability to specify where in a source field
that fragment should start or end (say for example at the start or end
of a sentence in a document).

Or am I missing something?

Lukas_Vlcek1 · September 22, 2010, 7:39pm

By setting number_of_fragments to 0. You can check javaDoc in the following
commit

github.com

elastic/elasticsearch/blob/243b7455e8578c9bdc401beb0c7e010c542d4a8e/modules/elasticsearch/src/main/java/org/elasticsearch/search/highlight/HighlighterParseElement.java

/*
 * Licensed to Elastic Search and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Elastic Search licenses this
 * file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.elasticsearch.search.highlight;

This file has been truncated. show original

It is also possible to override highlight settings at each field level
differently. HTH.
Regards,
Lukas

Dne 2010 9 22 21:26 "Adam Parkin" pzelnip@gmail.com napsal(a):
And how do I do that (retrieve whole field with highlighted tags)?

Thanks!

On Sep 22, 12:08 pm, Lukáš Vlček lukas.vl...@gmail.com wrote:

You are correct. It is not possi...
Dne 2010 9 22 21:02 "Adam Parkin" pzel...@gmail.com napsal(a):

I think this is currently already an open issue (http://github.com/
elasticsearch/elastics...