// This key is not used in SIREn. Instead, we use DATATYPES_ANALYZERS
this.set(ConfigurationKeys.ANALYZER, null);
// Set the default datatypes. Those are mandatory.
final Map<String, Analyzer> datatypes = new HashMap<String, Analyzer>();
datatypes.put(XSDDatatype.XSD_STRING, new StandardAnalyzer(Version.LUCENE_40));
datatypes.put(JSONDatatype.JSON_FIELD, new WhitespaceAnalyzer(Version.LUCENE_40));
this.set(KeywordConfigurationKeys.DATATYPES_ANALYZERS, datatypes);
this.set(KeywordConfigurationKeys.ALLOW_TWIG, true);
this.set(ConfigurationKeys.ENABLE_POSITION_INCREMENTS, true);
this.set(KeywordConfigurationKeys.ALLOW_FUZZY_AND_WILDCARD, true);