The OS2Synonym was programmed by Taxon ApS (http://taxon.dk)
Modified by Bellcom Udvikling ApS (http://bellcom.dk)
for OS2 - Offentligt digitaliseringsfællesskab (http://os2web.dk).

Copyright (c) 2014, OS2 - Offentligt digitaliseringsfællesskab.

The OS2Synonym is free software; you may use, study, modify and
distribute it under the terms of version 2.0 of the Mozilla Public
License. See the LICENSE file for details. If a copy of the MPL was not
distributed with this file, You can obtain one at
http://mozilla.org/MPL/2.0/.

All source code in this and the underlying directories is subject to
the terms of the Mozilla Public License, v. 2.0. 

This module allows transfer of synonyms to Apache Solr.

The following settings must be set:

'The name of Solr synonym file' The local synonyms.txt file the module will write synonyms to. The local Solr installation can be setup to read the synonyms from this file.

'The Solr core reload URL' The URL to call for a Solr core reload. For example: http://localhost:8983/solr/admin/cores?action=RELOAD&core=collection1

'The URL of the shared Solr synonyms text file' This allows the module to load synonyms from another Drupal installation. The URL could be set to http://<hostname>/OS2Synonym_download

The modules userinterface is located at /OS2Synonym. Here new synonyms can be manually entered, uploaded from a file, or from another Drupal installation.

The button 'Send to Solr' will save the synonyms ot the defined synonyms file and trigger a Solr core reload via the URL defined in settings.

Apache Solr can be setup to do either query time parsing or index time parsing of synonyms. Check Apache Solr's documentation for more information.

Drupalize.me has released a training series on settings up Solr with Drupal: https://drupalize.me/videos/better-search-results-solr-and-drupal-7.
The videos uses Search API as the search framework together with Search API Solr module for integration with Solr.

One of the vidoes in the series is about the usage of synonyms in Solr: https://drupalize.me/videos/configure-synonyms-solr