private PropertiesDescriptor <object> CreateInterpretedFieldsPropertyDescriptor()
{
//have to put limit on this field because if term/string is longer than the 32766 bytes it can't be stored in Lucene
var propDesc = new PropertiesDescriptor <object>();
propDesc.String(desc => desc
.Name("raw")
.Index(FieldIndexOption.NotAnalyzed).IgnoreAbove(10000).IncludeInAll(false));
var analyzerName = string.Format("{0}{1}", _analyzerPrefix, 1);
propDesc.String(desc => desc
.Name("1")
.Analyzer(analyzerName)
.SearchAnalyzer(analyzerName)
.TermVector(TermVectorOption.WithPositionsOffsetsPayloads));
// we only store the count for unigrams, because it's easy to calculate the others from this
propDesc.TokenCount(desc => desc
.Name("1" + _tokenCountSuffix)
.Analyzer(analyzerName)
.DocValues(true)
.Store(true));
return(propDesc);
}