+# When EXTERNAL_SEARCH is enabled doxygen will no longer generate the PHP
+# script for searching. Instead the search results are written to an XML file
+# which needs to be processed by an external indexer. Doxygen will invoke an
+# external search engine pointed to by the SEARCHENGINE_URL option to obtain
+# the search results. Doxygen ships with an example indexer (doxyindexer) and
+# search engine (doxysearch.cgi) which are based on the open source search engine
+# library Xapian. See the manual for configuration details.
+
+EXTERNAL_SEARCH = NO
+
+# The SEARCHENGINE_URL should point to a search engine hosted by a web server
+# which will returned the search results when EXTERNAL_SEARCH is enabled.
+# Doxygen ships with an example search engine (doxysearch) which is based on
+# the open source search engine library Xapian. See the manual for configuration
+# details.
+
+SEARCHENGINE_URL =
+
+# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the unindexed
+# search data is written to a file for indexing by an external tool. With the
+# SEARCHDATA_FILE tag the name of this file can be specified.
+
+SEARCHDATA_FILE = searchdata.xml
+
+# The EXTRA_SEARCH_MAPPINGS tag can be used to enable searching through other
+# doxygen projects that are not otherwise connected via tags files, but are
+# all added to the same search index. Each project needs to have a tag file set
+# via GENERATE_TAGFILE. The search mapping then maps the name of the tag file
+# to a relative location where the documentation can be found,
+# similar to the
+# TAGFILES option but without actually processing the tag file.
+# The format is: EXTRA_SEARCH_MAPPINGS = tagname1=loc1 tagname2=loc2 ...
+
+EXTRA_SEARCH_MAPPINGS =
+