Thanks Thomas. You mentioned "Also there is no need for the FlattenGraphFilter", that's quite interesting because the Solr documentation says it's mandatory for indexing: https://lucene.apache.org/solr/guide/7_6/filter-descriptions.html. Is there any more explanation for this?
Best regards, Wei On Mon, Jan 7, 2019 at 7:56 AM Thomas Aglassinger < t.aglassin...@netconomy.net> wrote: > Hi Wei, > > here's a fairly simple field type we currently use in a project that seems > to do the job with graph synonyms. Maybe this helps as a starting point for > you: > > <fieldType name="text_de" class="solr.TextField" > positionIncrementGap="100"> > <analyzer> > <tokenizer class="solr.WhitespaceTokenizerFactory" /> > <filter class="solr.ManagedSynonymGraphFilterFactory" > managed="de" /> > <filter class="solr.ManagedStopFilterFactory" managed="de" > /> > <filter class="solr.WordDelimiterGraphFilterFactory" > preserveOriginal="1" > generateWordParts="1" generateNumberParts="1" > catenateWords="1" > catenateNumbers="1" catenateAll="0" > splitOnCaseChange="1" /> > <filter class="solr.LowerCaseFilterFactory" /> > <filter class="solr.ASCIIFoldingFilterFactory" /> > <filter class="solr.GermanStemFilterFactory" /> > <filter class="solr.RemoveDuplicatesTokenFilterFactory"/> > </analyzer> > </fieldType> > > As you can see we use the same filters for both indexing and query, so > this might have some impact on positional queries but so far it seems > negligible for the short synonyms we use in practice. Also there is no need > for the FlattenGraphFilter. > > The WhitespaceTokenizerFactory ensures that you can define synonyms with > hyphens like mac-book -> macbook. > > Best regards, Thomas. > > > On 05.01.19, 02:11, "Wei" <weiwan...@gmail.com> wrote: > > Hello, > > We are upgrading to Solr 7.6.0 and noticed that SynonymFilter and > WordDelimiterFilter have been deprecated. Solr doc recommends to use > SynonymGraphFilter and WordDelimiterGraphFilter instead > I guess the StopFilter mess up the SynonymGraphFilter output? Not sure > if it's a solr defect or there is a guideline that StopFilter should > not be put after graph filters. > > Thanks in advance for you input. > > > Thanks, > > Wei > > >
